From earlier *quoquō, from Proto-Italic *kʷekʷō, from Proto-Indo-European *pékʷeti by /*p - *kʷ/ assimilation (compare quīnque, from *pénkʷe), from *pekʷ- (“to cook, become ripe”). Cognate with Sanskrit पचति (pácati), Avestan 𐬞𐬀𐬗𐬀𐬌𐬙𐬌 (pacaⁱti), Ancient Greek πέσσω (péssō), Tocharian B päk-, Proto-Slavic *peťi, Albanian pjek.