Do you exact or extract revenge?

The verb exact (as in, "exacting revenge" or "exacting a promise") is not as commonly encountered as the adjective exact, (as in "an exact copy" or "exact measurements"). Sometimes people will mistakenly use the more common verb extract when they really want exact. Extract can refer to removing something by pulling or cutting or to getting information from someone who does not want to give it. While both words refer to getting something they are used in different ways. You extract a tooth, but you exact revenge.

The Crisscrossing Histories of Abstract and Extract

Abstract is most frequently used as an adjective (“abstract ideas”) and a noun (“an abstract of the article”), but its somewhat less common use as a verb in English helps to clarify its Latin roots. The verb abstract is used to mean “summarize,” as in “abstracting an academic paper.” This meaning is a figurative derivative of the verb’s meanings “to remove” or “to separate.”

We trace the origins of abstract to the combination of the Latin roots ab-, a prefix meaning “from” or “away,” with the verb trahere, meaning “to pull” or “to draw.” The result was the Latin verb abstrahere, which meant “to remove forcibly” or “to drag away.” Its past participle abstractus had the meanings “removed,” “secluded,” “incorporeal,” and, ultimately, “summarized,” meanings which came to English from Medieval Latin.

Interestingly, the word passed from Latin into French with competing spellings as both abstract (closer to the Latin) and abstrait (which reflected the French form of abstrahere, abstraire), the spelling retained in modern French.

The idea of “removing” or “pulling away” connects abstract to extract, which stems from Latin through the combination of trahere with the prefix ex-, meaning “out of” or “away from.” Extract forms a kind of mirror image of abstract: more common as a verb, but also used as a noun and adjective. The adjective, meaning “derived or descended,” is now obsolete, as is a sense of the noun that overlapped with abstract, “summary.” The words intersected and have separated in modern English, but it’s easy to see that abstract applies to something that has been summarized, and summarized means “extracted from a larger work.”