| highbrow(adjective, indifferent, detached, distant, apathetic) |
| iceberg(adjective, calm, detached, sober, unfeeling) |
| imperturbable(adjective, calm, detached, sober, unfeeling) |
| impervious(adjective, indifferent, detached, distant, apathetic) |
| in the clear(expression, idiom) |
| indolent |
| insensible(adjective, indifferent, unfeeling, unsympathetic, inattentive) |
| intelligible(adjective, quiet, clear, smooth, easy) |
| judicial(adjective, calm, detached, sober, unfeeling) |
| just(noun, adjective, calm, detached, sober) |
| lackadaisical(adjective, indifferent, detached, casual, unsympathetic) |
| lacking interest |
| laid back(expression, adjective, calm, detached, sober) |
| latent(adjective, quiet, indifferent, apathetic, lifeless) |
| liberated |
| long-suffering(adjective, quiet, indifferent, apathetic, lifeless) |
| loose |
| lucid(adjective, quiet, clear, smooth, easy) |
| lukewarm(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| manageable(adjective, clear, light, smooth, simple) |