loc

The root loc comes from Latin locus, meaning simply "a place" — a spot you could point to. The Romans built a verb from it, locare, "to put something in a place," and from that one idea English grew a whole family of words about where things are and what we do to put them there.

Start with the bare place itself. local is what belongs to a place; location is the place where something sits; locale (borrowed later through French) is the place where an event happens. The mathematical and biological locus is the Latin word taken in whole — a precise point, like a gene's locus on a chromosome.

Now add prefixes, and watch the verb locare do the work of placing:

- lo + cate → locate: put it in a place, or find the place it's in.
- ad- (to) + locare → allocate: place something toward a purpose — you set funds aside to a project. The double l comes from ad- assimilating before loc.
- re- (again) + locate → relocate: place again, somewhere new — a company that moves cities relocates.
- dis- (apart) + locate → dislocate: knock a thing out of its proper place. A shoulder forced out of its joint is dislocated; a society thrown out of order suffers dislocation.
- trans- (across) + locate → translocate: shift across to another place — used for moving wildlife, or for a chromosome segment that jumps position.

The most surprising member is collocation. col- (together) + locare = "placed together." In ordinary speech it just meant a side-by-side arrangement, but linguists gave it a sharp meaning: words that habitually sit next to each other — "heavy rain," "make a decision." The placing is now about word-neighborhoods, not physical spots.

Notice the pattern: loc stays fixed as "place," and the prefix tells you what happens to the placing — toward (allocate), again (relocate), apart (dislocate), together (collocate). Once you see locus underneath, the family stops being a list to memorize and becomes a single picture: things, and where you put them.

One trap worth flagging: circumlocution looks like it belongs here (circum- + loc...), but its middle is loqui "to speak," not locus "place." It means "talking around" a point, and is a same-spelling coincidence, not a real loc word.