English
Twofish
Blend of two + Blowfish.
Proto-Indo-European *dwóh₁
Proto-Germanic *twai
Proto-West Germanic *twai-
Old English twā
Middle English two
English two
Today it means
name An encryption algorithm, related to the earlier Blowfish, used in modern cryptographic software.
Language periods are conventional ranges, not dates for this word.
Etymograph / Twofish