| impromptu(adjective, characteristic, chance, randomness) |
| improvised(adjective, characteristic, chance, randomness) |
| impulsive(adjective, characteristic, chance, randomness) |
| incidental(adjective, characteristic, chance, randomness) |
| incurious(adjective, characteristic, ease, relaxedness) |
| indifferent(adjective, characteristic, ease, relaxedness) |
| infrequent(adjective, characteristic, chance, randomness) |
| insouciant(adjective, characteristic, ease, relaxedness) |
| irregular(adjective, characteristic, chance, randomness) |
| lackadaisical(adjective, characteristic, ease, relaxedness) |
| laid-back(adjective, characteristic, ease, relaxedness) |
| loose(adjective, characteristic, ease, relaxedness) |
| low-pressure(adjective, characteristic, ease, relaxedness) |
| mellow(adjective, characteristic, ease, relaxedness) |
| nonchalant(adjective, characteristic, ease, relaxedness) |
| occasional(adjective, characteristic, chance, randomness) |
| odd(adjective, characteristic, chance, randomness) |
| off-the-cuff(adjective, characteristic, chance, randomness) |
| offhand(adjective, characteristic, chance, randomness) |
| perfunctory(adjective, characteristic, ease, relaxedness) |