[firgen-holt], st. m., mountain-wood, mountain-forest: acc. sg. on fyrgen-holt, [1394].
[firgen-streám], st. m., mountain-stream: nom. sg. fyrgen-streám, [1360]; acc. sg. under fyrgen-streám (marks the place where the mountain-stream, according to [1360], empties into Grendel's sea), [2129].
[fisc], st. m., fish: in comp. hron-, mere-fisc.
[fîf], num., five: uninflect. gen. fîf nihta fyrst, [545]; acc. fîfe (?), [420].
[fîfel-cyn] (O.N. fîfl, stultus and gigas), st. n., giant-race: gen. sg. fîfelcynnes eard, [104].
[fîf-tene, fîf-tyne], num., fifteen: acc. fýftyne, [1583]; gen. fîftena sum, [207].
[fîf-tig], num., fifty: 1) as substantive with gen. following; acc. fîftig wintra, [2734]; gen. se wäs fîftiges fôt-gemearces lang, [3043].—2) as adjective: acc. fîftig wintru, [2210].
[flân], st. m., arrow: dat. sg. flâne, [3120]; as instr., [2439].
[flân-boga], w. m., bow which shoots the flân, bow: dat. sg. of flân-bogan, [1434], [1745].
[flæsc], st. n., flesh, body in contrast with soul: instr. sg. nô þon lange wäs feorh äðelinges flæsce bewunden, not much longer was the son of the prince contained in his body, [2425].