Synonymes casual (anglais)

Adjectif
- chance : accidental, unplanned, spontaneous, fortuitous, adventitious, unexpected, unforeseen
- haphazard : irregular, capricious, erratic, hit-or-miss, odd, infrequent, random
- indifferent : perfunctory, unconcerned, careless, apathetic, aloof, nonchalant
- off-hand : incidental, insouciant, easygoing, nonchalant, breezy, aimless, effortless