fosta f. staidness, steadiness [180], [187], [194], [215], [218].
fotha n. foundation, f. n-utmall [173]. Cf. ní cóir in fotha utmall, Sg. 4b.
fothirbe a field (?) [56], Trip. 82, 2; 168, 26.
freccor (verb-n. of fris-curim) opposition, objection [154], ML 131a8.
frecra (verb-n. of fris-garim) n. an answer [174].
frith-nóill a counter-oath [165].
fúaimm n. a din, noise [146], f. nglan, LL. 150b4; f. in churaig risin tracht, YBL 89b; n. pl. fúammann [146].
fúatche f. a snatching, carrying off [140].
fuchacht (fuichecht) f. copulation, cohabitation [155].
fuigliur I pronounce judgment, fuigletar [161].