| footboy | n. | boy servant | ||
| footling | adj. | blithering, foolish, silly | ||
| footy | adj. | paltry, worthless | ||
| foozle | v. | to bungle, esp. in golf | ||
| forcemeat | n. | ground or sieved meat mixed with fat and sometimes flavoring or vegetables for use in various recipes | ||
| forearm | v. | to arm beforehand | ||
| forehanded | adj. | prudent; resilient | ||
| foreland | n. | headland, promontory; land adjacent to mountains where material has been deposited from the peaks by action of plate tectonics | ||
| foremother | n. | female ancestor; female predecessor | ||
| foreweary | v. | to make tired at an earlier time | ||
| forfend | v. | to protect by precautionary measures; to prevent, to fend off | ||
| forgather | v. | to gather together, to assemble | ||
| formication | n. | sensation as if ants are crawling on one’s skin | ||
| fornenst | prep. | next to; facing | ||
| forritsome | adj. | impudent, forward | Scots | |
| forsooth | adv. | indeed, in fact | archaic | |
| fortalice | n. | a small fort; (archaic) fortress | ||
| forte | n. | specialty or exceptional ability of a person | ||
| fosse | n. | ditch, trench; defensive moat used around a fortification | ||
| fossick | n. | to search for gold in abandoned diggings; to hunt about | ||
| foulard | n. | lightweight cloth of silk or silk and cotton, often with printed design | ||
| fox | v. | to discolor, to become spotted | ||
| fractionize | v. | to divide into fractions | ||
| fractious | adj. | unruly; quarrelsome | ||
| franklin | n. | freeholder of land in 14th–15th centuries, ranking just below the gentry | ||
| frass | n. | insect excrement | ||
| fraught | adj. | laden, filled | ||
| fray | n. | fight, brawl | ||
| freeboard | n. | distance between waterline and topmost waterproof deck on a ship | ||
| fremescent | adj. | murmuring, increasingly noisy | ||
| fremitus | n. | palpable bodily vibration | ||
| French cricket | n. | informal game using cricket bat (or any such stick) and soft ball (e.g., a tennis ball) with no wickets where batsman tries to fend off ball thrown at or between his legs | British | |
| French leave | n. | unannounced or surreptitious departure, absence without authorization | ||
| fret | v. | to gnaw; to wear away by gnawing, friction, corrosion, etc. | ||
| friable | adj. | easily broken into powder or crumbled, crumbly | ||
| fribble | v. | to act aimlessly; to trifle, to behave frivolously; a trifler | ||
| frieze | n. | coarse woolen cloth napped on one side only | ||
| frighten the horses | v. | to upset public standards, to cause moral alarm | idiom | |
| fritinancy | n. | twittering (also fritiniancy, fritiniency) | ||
| frivol | v. | to act in a silly manner | ||
| frog | n. | belt attachment for carrying sword, bayonet, hatchet, or machete | ||
| frontlet | n. | decorative ornament worn on forehead; phylactery | ||
| frore | adj. | frozen, extremely cold | archaic | |
| frot | v. | to rub, to chafe, to stroke; [tanning] to make supple by rubbing | ||
| frounce | n. | pleat or fold (of cloth) | ||
| froward | adj. | contrary, refractory, untoward | ||
| frowsty | adj. | musty, hot and stuffy | ||
| frowzy | adj. | musty, bad smelling; slatternly, unkempt | ||
| fruitive | adj. | fruitful; enjoying, possessing | ||
| fuddle | v. | to confuse; to inebriate; to tipple, to go on a drinking spree |
