Where does “irritant” come from?

irritant (English) comes from French irritant, from Latin irrito, 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.

irritant (English): Causing irritation or inflammation; Rendering...

Definitions

  1. Causing irritation or inflammation; Rendering...

Ancestry of “irritant”, step by step

StepLanguageWordMeaning
1Frenchirritantpresent participle of irriter; irritating;...
2LatinirritoI incite, excite, stimulate, instigate, provoke;...
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

Words derived from “irritant

Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr