Words related to force

forced (adj.)
"not spontaneous or voluntary, strained, unnatural," 1570s, past-participle adjective from force (v.). Meaning "effected by an unusual application of force" is from 1590s. Related: Forcedly. The flier's forced landing attested by 1917.
fort (n.)

mid-15c., "fortified place, stronghold," from Old French fort "fort, fortress; strong man," noun use of adjective meaning "strong, stout, sturdy; hard, severe, difficult; hard to understand; dreadful, terrible; fortified" (10c.), from Latin fortis "strong, mighty; firm, steadfast; brave, spirited," from Old Latin forctus, which is of unknown etymology. Possibly from PIE root *bhergh- (2) "high, elevated," with derivatives referring to hills and hill-forts, or possibly from *dher- "to hold firmly, support." Figurative use of hold the fort attested from 1590s.

forcible (adj.)
early 15c., "powerful, violent; done by force," from Old French forcible "strong, powerful, mighty," from forcier "conquer by violence" (see force (v.)). From 1550s as "possessing force." Related: Forcibly.
forge (v.2)
1769 (with an apparent isolated use from 1610s), "make way, move ahead," of unknown origin, perhaps an alteration of force (v.), but perhaps rather from forge (n.), via notion of steady hammering at something. Originally nautical, in reference to vessels.
unforced (adj.)
1590s, from un- (1) "not" + past participle of force (v.).
air force (n.)
1917, from air (n.1) + force (n.); first attested with creation of the Royal Air Force. There was no United States Air Force until after World War II. The Air Corps was an arm of the U.S. Army. In 1942, the War Department reorganized it and renamed it Army Air Forces. The National Security Act of 1947 created the Department of the Air Force, headed by a Secretary of the Air Force, and the U.S.A.F.
enforce (v.)

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.

force-feed (v.)
by 1905 in animal husbandry, from force (n.) + feed (v.). Related: Force-fed; force-feeding. Force-feeding (n.) is from 1900.
forceful (adj.)
1570s, from force (n.) + -ful. Related: Forcefully; forcefulness.
perforce (adv.)

"by physical force or violence, forcibly," c. 1300, par force, from Old French phrase par force (12c.), literally "by force" (see force). With Latin per substituted 17c. in place of its French offspring par.