- five (n.)
- Old English fif, from Proto-Germanic *fimfe (cf. Old Frisian and Old Saxon fif, Dutch vijf, Old Norse fimm, Old High German funf, Gothic fimf), from PIE *penkwe- (cf. Sanskrit panca, Greek pente, Latin quinque, Old Church Slavonic peti, Lithuanian penke, Old Welsh pimp).
Slang five-finger discount "theft" is from 1966. Five o'clock shadow attested by 1937. The original five-year plan was 1928 in the U.S.S.R.