casually

ad.1.偶然地,碰巧地;2.漫不经心地,随便地

cast iron, cast light on, cast oneself on, cast-off, castanets, castaway, caste, castellated, castigate, castigation, casting, casting vote, castle, castoff, castor (also caster), castor oil, castor sugar (also caster sugar), castrate, castration, casual, casualness, casuals, casualty, casualy, casuist, casuistic, casuistically, casuistry, casus belli, cat, cat burglar, cat out of the bag, cat's-cradle, Cat's-eye, cat-o-nine-tails, cataclysm, cataclysmic, catacombs, catafalque, catalepsy,