Where does “aicét” come from?

aicét (Old Irish) comes from Latin acetum, from Latin acere, from Latin aceo, from Proto-Italic akēō, from Proto-Indo-European h₂eḱ-éh₁-ye-ti, from Proto-Indo-European h₂eḱ- — sharp.

Ancestry of “aicét”, step by step

StepLanguageWordMeaning
1Latinacetumvinegar; wit, shrewdness
2Latinacerepresent active infinitive of aceō; ablative...
3LatinaceoI am sour; I am disagreeable
4Proto-Italicakēōbe sharp-tasting, be sour
5Proto-Indo-Europeanh₂eḱ-éh₁-ye-ti—
6Proto-Indo-Europeanh₂eḱ-sharp
Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European h₂eḱ-éh₁-ye-ti →Every word from Proto-Italic akēō →