Where does “irritatable” come from?

irritatable (English) comes from English irritate, from Latin irritatus, from Latin irritus, from Latin ratus, from Latin rēōr, from Proto-Italic rēōr, from Proto-Indo-European h₂reh₁-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

irritatable (English): Capable of being irritated; irritable

Definitions

  1. Capable of being irritated; irritable

Ancestry of “irritatable”, step by step

irritatable traces back through two separate lines of ancestry.

via English irritate

StepLanguageWordMeaning
1EnglishirritateTo provoke impatience, anger, or displeasure in;...
2Latinirritatusincited, excited, stimulated, instigated,...
3Latinirritusinvalid, void, null and void; ineffective,...
4Latinratusconsidered, having been considered; established,...
5Latinrēōrto reckon, calculate
6Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
7Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
8Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English able

StepLanguageWordMeaning
1EnglishableEasy to use; Suitable; competent; Liable to
2Middle Englishablecapable, expert, qualified, skilful, competent
3Old Frenchableable; capable
4Latinhabilisable to have/possess/maintain; having sufficient...
5Latin-ilis-ile
6Proto-Italic-elis
7Proto-Indo-European-elis
8Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr