second nature

a usual manner of behaving or doing speaking and thinking in Japanese simply became second nature to her during the years she spent in Kyoto Synonyms custom, fashion, habitude, pattern, practice (also practise), ritual, habit, trick, way, wontRelated Words addiction; disposition; bent, inclination, proclivity, set, tendency, tenor, turn; bag, convention, form, mode, style; usage, use; deportment, manners, mores; drill, groove, jog trot, regime (also régime), regimen, rote, routine, rut; affectation, airs, pose; attribute, characteristic, mark, trait; eccentricity, kink, oddity, peculiarity, quirk, singularity, tic