plic
Latinfold, bend, layer
About This Root
The root plic comes from Latin plicāre, "to fold." Picture a single sheet of cloth or parchment. You can fold it in different directions, and Latin used prefixes to say which way the fold went. That one physical action — folding — turns out to explain a surprising number of English words.
Fold things together and they pile up into a mess: com- (together) + plic → complicate literally means "fold together," and a complicated problem is one where everything is folded into everything else. Fold something outward, smoothing it flat, and you can finally see it: ex- (out) + plic → explicit means "unfolded," laid open so nothing is hidden. Fold something inward and you hide it: in- (in) + plic → implicit is "folded in," present but not spelled out. The same in/out contrast runs through implicate (fold someone into a crime) and explicate (unfold a text to explain it).
Fold again and again and you make copies: re- (back, again) + plic → replicate is to re-fold, to reproduce; a replica is the folded-again copy. Fold in many layers and quantities grow: multi- (many) + plic → multiply. Fold something thoroughly until it tangles: per- (completely) + plic → perplex, to leave someone hopelessly twisted up.
Here is the surprise. A whole family of everyday words — apply, employ, display, deploy, ploy — are the same root, just dressed in French clothes. As plicāre passed through Old French it softened into -ploi / -ployer. So apply is ad- (toward) + the folded root = "fold toward, lay one thing onto another"; employ is in- + it = "fold someone into work"; display and deploy are both dis- (apart) + it = "unfold, spread out" (display kept the "show" sense, deploy the military "spread out troops" sense). A ploy is a clever little fold — a maneuver. Once you know ploy = plic, a chunk of business and military vocabulary lines up behind one image.
A few quieter members stay close to literal folding: pliable and pliant describe something that bends easily, a pleat and a plait are folds you can see in fabric and hair, and supplicate is sub- (under) + the root = to fold yourself down, bending low to beg.
The rule of the family: whatever the prefix, plic is always a fold. Ask "folded which way?" — together (complicate), out (explicit), in (implicit), again (replicate), or down (supplicate) — and the meaning falls into place.
Think of folding a piece of paper. Fold it together and it gets complic-ated; fold it out flat and it's expli-cit (open); fold it in and it stays impli-cit (hidden). Even apply, employ and deploy are the same fold in a French disguise — "folding" something toward you, into a job, or out across a field.
Core Words Deep Dive
The few words from this family worth telling in full — one by one.
ex- (out) + plic (fold) = "folded out, unrolled." Imagine unfolding a map until every road is visible — nothing left hidden in the creases. That is explicit: stated so openly there is no room to guess. Its mirror twin is implicit (in- + plic, "folded in"), where meaning stays tucked inside. The pair is the clearest demonstration that plic is direction-of-fold: out vs in.
com- (together) + plic (fold) = "fold together." Picture folding several sheets of paper into one another until you can no longer tell which edge belongs to which sheet — that tangle is a complicated situation. The word never lost its physical image: things become complicated precisely when too many parts get folded into one another.
The most disguised member. apply comes from Latin ad- (toward) + plicāre (fold), but it traveled through Old French, where plicāre softened into -ply. "Fold toward" means laying one thing onto another — which is why you apply paint to a wall, apply a rule to a case, and apply (= attach yourself) for a job. Same fold, French spelling: that is why apply, employ, display and deploy don't look like plic at all.
dis- (apart) + plic (fold), via French = "unfold, spread out." A folded map or a folded line of soldiers gets opened out across the ground — that is deploying. Its sibling display is the exact same parts (dis- + plic), but display kept the "spread out to be seen" sense while deploy kept the military "spread out for action" sense. One unfolding, two careers.
per- (thoroughly) + plex (a variant of plic, fold) = "folded through and through." Imagine a knot folded over itself so many times you cannot find an end to pull — that is exactly how a perplexing problem feels. The -plex spelling (also in complex, multiplex) is the same root surfacing through a different Latin form.
Related Roots
Both are about bending, but plic (fold) makes layers — folding a flat thing onto itself: complicate, explicit, multiply. flect/flex bends a line or direction — reflect (bend back), flexible (able to bend). Quick test: stacking or layering → plic; changing direction or curving → flect.
plic and flex both came into English meaning "bend," and look alike in flexible vs pliable. But flex words usually keep a literal bend-and-spring sense (flex a muscle, flexible), while plic words drifted into folding and layering (complicated, implicit). If it springs back, it's flex; if it folds and stays folded, it's plic.
Associated Words · 55
accomplice
A person who helps another commit a crime
applicable
Relevant or suitable to a particular situation
applicant
A person who formally applies for something
application
The act of applying or laying on, in a literal sense
applied
Put into practical use; practical rather than theoretical
apply
To lay or place; to put (one thing to another); Resembling apples, apple-like
complex
Made up of many parts; difficult to understand; a group of related buildings
complexity
The state of being intricate or complicated
compliance
The act of obeying rules or requests; yielding to others' wishes
compliant
Willing to obey rules or follow others' wishes
complicate
To make more complex or difficult
complicated
Consisting of many parts; difficult to understand or deal with
complication
A difficulty making things more complex; a medical condition arising alongside another
complicity
Involvement as an accomplice in a crime or wrongdoing
comply
To act in accordance with rules or requests; to obey
deploy
To position troops or resources for use; to install a system
display
A public show or screen; to show something openly
employ
To hire someone for work; to make use of something for a purpose
employee
a person who is paid to work for an employer
employer
A person or company that hires and pays workers
employment
The state of having a paid job; the act of hiring someone
explicable
Able to be explained
explicate
To explain in careful detail
explicit
Clearly and directly expressed; leaving nothing implied
exploit
To use something for one's advantage; a heroic deed
exploitation
The use of something or someone, often unfairly for personal gain
implicate
To show involvement in wrongdoing; to imply as a consequence
implication
An indirect effect or consequence; something suggested without being stated
implicit
Implied but not directly stated; absolute and unquestioning
imply
To suggest something indirectly; to have as a logical consequence
inexplicable
Impossible to explain or account for; baffling
multiple
Having more than one part or instance; a number that is a product of a smaller number
multiplication
The arithmetic operation of multiplying; an increase in number
multiplicity
A large and varied number or variety
multiply
To perform multiplication; to increase greatly in number
non-complying
Failing to follow rules or requirements
noncompliance
Failure to obey rules or requirements
noncompliant
Refusing to follow rules or comply with requirements
perplex
To cause confusion or puzzlement; to baffle
perplexing
Causing confusion or bewilderment
plait
A braid of hair or material; to braid or weave strands together
pleat
A fold in fabric; to make such folds
pliable
Easily bent; easily influenced
pliant
Easily bent; readily yielding to influence
pliers
A gripping hand tool with two hinged jaws
ploy
A clever tactic or trick to gain an advantage
ply
A layer or strand of material; to work at or travel regularly
replica
An exact or very close copy of something
replicate
To make an exact copy of; to repeat an experiment
reply
To answer or respond; a spoken or written response
suppliant
One who humbly begs or pleads; humbly entreating
supplicant
A person who humbly prays or petitions; begging humbly
supplicate
To make a humble and earnest request; to beg
unemployed
Without a job; the jobless as a group
unemployment
The state of not having a job; the level of joblessness in an economy