fivefold, a. quintuple.
five languages. Associated word: pentaglot.
five-sided, a. pentagonal, pentahedral.
five years. quinquennium, lustrum. Associated words: quinquennial, quinquennially.
fir, v. [mend], [repair], [restore], adjust; rivet, [fasten]; [settle], [fasten], [establish], [implant], define.
fix, n. (Colloq.) [dilemma], predicament, [plight], [quandary]. Antonyms: extrication, [release].
fixed, a. [immovable], established, [stable], [firm], unchangeable [steadfast], stereotyped.
fixings, n. pl. (Colloq.) embellishments, trimmings.
fizzle, n. (Colloq.) [failure], fiasco.
flabbergast, v. (Jocular) [astonish], [amaze], [surprise], [dumfound].