adj usual, habitual(?): math forcenda a thoil ainnas nacnapthe (= ó indas acnapthe) as bliadain `ut moris est', Ériu vii 146 § 35 . nech dogni etrath o belaib .iiii. anni in cetfecht ma gnathach acnapthe .uii. annis `si fit consuetudo et usus', 144 § 22 . Cf. accnabad?