Where does “unintentional” come from?

Unintentional derives from English intentional, which comes from English intention, ultimately tracing through Latin in- and Proto-Indo-European ano- meaning "not" or "without."

unintentional (English): Not intended or deliberate; inadvertent;...

Definitions

  1. Not intended or deliberate; inadvertent;...

Ancestry of “unintentional”, step by step

StepLanguageWordMeaning
1EnglishintentionalIntended or planned; done deliberately or...
2Frenchintentionnelintentional
3Frenchintentionintention
4Middle FrenchintentionAlternative form of entention
5Old Frenchentencionintention; intent; aim
6Latinintentiostrain, tension; increase, augmentation;...
7Latin-tiōtion, -ation, -ing
8Latindissertātiō(spoken) dissertation, discourse, disquisition
9Latindissertusarranged, disposed; explained
10Latindissereresecond-person singular future passive indicative...
11Latindis-asunder, apart, in two; reversal, removal;...
12Latincalceusshoe
13Latincalxlimestone; chalk; the finish line
14Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

Words derived from “unintentional

Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-