English

Threefish

From three + fish, modelled on the earlier Twofish.

A compound of three + fish

Proto-Indo-European *tréyes

Proto-Germanic *þrīz

Proto-West Germanic *þrīʀ

Old English þrī

Middle English thre

English three

Proto-Indo-European *piskós

Proto-Germanic *fiskaz

Proto-West Germanic *fisk

Old English fisċ

Middle English fisch ‘an animal that inhabits the water or the meat…’

English fish

Today it means

name A symmetric-key tweakable block cipher involving the Skein hash function.

Language periods are conventional ranges, not dates for this word.

Etymograph / Threefish