From PIE *pénkʷe — cognate with Latin 'quīnque' and Sanskrit 'páñca,' whose Hindi descendant gave us 'punch' (five ingredients).
The cardinal number following four and preceding six; the number of fingers on one hand.
From Old English 'fīf,' from Proto-Germanic *fimf (five), from PIE *pénkʷe (five) — one of the most securely reconstructed numerals in the proto-language. The initial Germanic /f/ reflects Grimm's Law: PIE *p shifted to Proto-Germanic *f in the First Germanic Sound Shift. The labiovellar *kʷ explains the irregular Latin form 'quīnque' (in which the initial *p assimilated to *kʷ by regressive assimilation, then the *kʷ doubled) and the Greek 'pénte' (where *kʷ simplified before a front vowel to a plain stop).