| Mod.Greek | ftiltón | downy feather |
| Anc.Greek | ptílon | downy feather |
| Gael.I. | fitean | feather |
| AS | fidter | id. |
| Svensk | fiäder | id. |
| Icel. | fiodur | id. |
| Germ. | feder | id. |
| Dutch | veder, veer | id. |
| Engl. | feather | feather (no kin to Greek pterónð6.3.1.) |
| Germ.(a.litt.) | vettag, facker | wing |
| Germ.reg. | federich | wing |
| Germ.(o.liter.) | fettdhahha | wing |
| Germ.(HG) | fittich | wing |
| Franç.: Nendaz (VS) | fetuya | une graminée |
| Franç.: Lens | fehôya | graminée |
| Franç.: Sav. | fétu | graminée |
| Franç. | fétu | wisp of straw |
| Gael.I. | faithead | flapping movement |
| Gael.I. | faithirleog | Lapwing, 158 |
| Gael.S. | faithirleag, fairleag | Lapwing, 158 |
| Basque | foten | beating |
| Franç. | fouetter | to beat (certainement pas de fou "hêtre") |
| Franç.rég. | fouetteux | Sparrow Hawk, 225 |
| Breton | foeter dour | White Wagtail, 313 |
| Breton | faout-avel | Swift, 321 |
| Franç. | foudre | lightning. Not from Lat. fulgurð6.2.14. |
| Alb. | fët | rapidly |
| Ital. | fûta | flightð6.2.12. (running away), cf. filerð6.2.6., |
| Franç. | futile | vain |
| Roman. | fîtîi | agitate |
| Anc.Greek | phoitos | agitation |
| Czech | futjík, chvoitjík | Black Redstart, 348 (quivers tail) |
| Czech | chveti se | vibrate |
| Czech | chvost | tail, cf. zagelð6.3.10. |
| Alb. | fut | I push |
| Franç. | future | future: uncertain period |
| Ital.: V. Verzasca | fòtt | to throw, toss |
| Franç. | foutre | to throw, fling, etc. |
| Lat. | futuere | to have a sexual relation |
| Roman. | fute-vînt, futluris | Kestrel, 234 |
| Aroman. | fiturische | Kestrel, 234 |
| Sbc. | fitubinac | Kestrel, 234 |
| Ital.reg. | fottivento | Kestrel, 234 |
| Engl. | fuck-wind | (t>k) Kestrel, 234 |