Etymology

New formation to the past tense thàrla ‎(“happened”), from Old Irish do·rala, ·tarla ‎(“happened; put (past tense)”) (suppletive preterite of do·cuirethar), from to- + ro- + Proto-Celtic *layo-, from Proto-Indo-European *leh₁- ‎(“let, leave”) (Latin lētum ‎(“death”); Old Church Slavonic лѣнъ ‎(lěnŭ, “lazy”); Hittite [script needed] ‎(laizzi, “lets”); Lithuanian liáutis ‎(“stop”); Gothic 𐌻𐌴𐍅𐌾𐌰𐌽 ‎(lēwjan, “betray”), 𐌻𐌴𐍅 ‎(lēw, “opportunity, cause”)). Compare Irish tarlaigh.