mid-14c., "to drive by physical force; to try, attempt, strive; to fortify, strengthen a place;" late 14c. as "exert force, compel; make stronger, reinforce; strengthen an argument; grow stronger, become violent," from Old French enforcier "strengthen, reinforce; use force (on), offer violence (to); oppress; violate, rape" (12c.) or a native formation from en- (1) "make, put in" + force (n.). Meaning "compel obedience to" (a law, etc.) is from 1640s. Related: Enforced; enforcing.
"energetic force; motive force," 1894, from dynamic (adj.). As "manner of interaction," by 1978.
also A.E.F., abbreviation of American Expeditionary Force, the U.S. military force sent to Europe in 1917 during World War I.
"to compel, force," c. 1400, from Latin coactare "constrain, force," frequentative of cogere (past participle coactus) "to compel," also "curdle, collect" (see cogent). Related: Coacted; coacting; coaction; coactive.
"to force or press; force open by means of a lever," 1680s, from prize (n.) "the hold of a lever" (14c.), from Old French prise "a taking hold, a grasp" (see prize (n.2)). Related: Prized; prizing.
1690s, "to beat, slap;" 1775 as "to shut with force," from slam (n.1). Meaning "throw or push with force" is from 1870. Meaning "say uncomplimentary things about" is from 1916. Related: Slammed; slamming.