teachd

I

coming, arrival, Irish teachd, Old Irish techt, aditus, itio, Welsh taith, iter, Breton tiz, diligence, haste: *tiktâ, root stig, teig, as in tighinn, q.v. Some derive it from thig or tig, q.v. Hence teachdaire, messenger.

II

legal, lawful, Middle Irish teachta, téchta, Old Irish téchte, fitting, legalis, lex: *tenctio-, root, tenq, become, chance, produce, English thing, Lithuanian tenkù, chance, befaull, Latin tempus. Dial. form deic, cha deic, q.v.