Etymology

unlesss

U1N1L1E1S1S1S1

Today it means: Precisely unless. Full definition →

Ask AI about its historyChatGPTClaudePerplexityGoogle AIGrok

The story

Attributed to John Horton Conway. From unless, by analogy with the formation of iff from if.

Etymology from Wiktionary, CC BY-SA 4.0.