tot

The Latin adjective tōtus meant "whole, entire, complete" — not a sum you add up, but the wholeness of a single thing taken all together. A tōtus mountain was the mountain in its entirety; a tōtus day was the day from dawn to dusk. English borrowed this idea of "all of it, nothing left out," and a small but tight family grew from it.

Start with the anchor: total. As a noun it is the whole amount you get when you bring every part together — the total of the bill. As an adjective it pushes the same idea to the extreme: total darkness, a total disaster, total silence — meaning complete, with no exception. As a verb it is simply the act of adding up: the damages totalled a million dollars. One word, three faces, all built on "the whole of it."

Add a suffix and the meaning stays put but the grammar shifts:

- -ly → totally: "in a total way," i.e. completely. Totally different, totally wrong. In casual speech it has drifted into a pure intensifier — "That's totally awesome" — where it barely means anything more than "very."
- -ity → totality: the noun for the state of being whole — the totality of the evidence, the totality of the experience. Astronomers also borrowed it for the dramatic moment of a solar eclipse when the sun is totally covered: the phase of totality.
- -itarian → totalitarian: this is where the root turns dark. A totalitarian state is one that demands total control — over politics, work, family, even thought. The word literally says: "the government wants the whole of you." The same suffix appears in authoritarian and egalitarian; here it attaches to total to name the most all-consuming kind of regime.

Then the one true surprise: factotum. It is a tiny Latin sentence frozen into a noun: fac ("do!", from facere) + totum ("everything") = "do everything." A factotum is the person who does every odd job — the handyman, the dogsbody, the jack-of-all-trades who fixes the printer and makes the coffee. Notice totum here is the neuter of tōtus, "the whole lot," so a factotum is literally a "do-the-whole-lot" person.

Two more relatives worth knowing live just outside this input. Teetotal (to abstain completely from alcohol) is total with an emphatic stuttered T- prepended — "T-total abstinence," total with a capital, exaggerated T. And the Latin phrase in toto ("in the whole," i.e. entirely, as a whole) survives untranslated in formal English. Both keep the root's one promise: not a part, but the whole.

The pattern is clean. Wherever you see tot-, picture wholeness — every part gathered, nothing left out. The suffix tells you whether it's a sum (total), a manner (totally), a state (totality), or a system that wants all of you (totalitarian).