| apathetic(adjective, indifferent, nonchalant, undisturbed, undaunted) |
| buoyant(adjective, feature, state, trait, casual) |
| composed(adjective, calm, quiet, light, smooth) |
| fearless(adjective, unconcerned, carefree) |
| freewheeling |
| gay(adjective, feature, state, trait, casual) |
| irresponsible(adjective, feature, state, trait) |
| jaunty(adjective, feature, state, trait, casual) |
| lackadaisical(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| laid-back(adjective, feature, state, calm, informal) |
| light-hearted(adjective, feature, state, trait) |
| lighthearted(adjective, feature, state, trait, casual) |
| slaphappy |
| sunny(adjective, feature, state, trait, casual) |
| at ease(expression, adjective, idiom, calm, quiet) |
| blind(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| blithesome(adjective, feature, state, trait) |
| bouncy(adjective, feature, state, trait) |
| bubbly(adjective, feature, state, trait) |
| carefree apathetic(expression, adjective, indifferent, unsympathetic, inattentive) |