Where does “unnecessary” come from?

Unnecessary derives from English un- plus necessary, which comes from Latin necessarius, formed from Latin necessē (unavoidable) and the adjective suffix -arius, ultimately tracing to Proto-Indo-European ne (not) and Proto-Indo-European óynos (one).

unnecessary (English): Not needed or necessary; Done in addition to...

Definitions

  1. Not needed or necessary; Done in addition to...

Ancestry of “unnecessary”, step by step

StepLanguageWordMeaning
1EnglishnecessaryRequired, essential, whether logically...
2Middle Englishnecessarye
3Old Frenchnecessaire
4Latinnecessāriusunavoidable, inevitable
5Latinnecesseunavoidable, "particularly"
6Latincessusconceded, given up, granted, surrendered,...
7Latincēdōto go, move, proceed, go along, move along
8Proto-Italickedōgive here!
9Proto-Italickehere
10Indo-European*ḱe

Words derived from “unnecessary

Every word from Indo-European *ḱe