| hubristic |
| hushed(adjective, calm, quiet, cool, easy) |
| immutable(calm, strong, solid, steady, substantial) |
| impassive(adjective, quiet, cool, moderate, gentle) |
| in position(expression, adjective, ready) |
| indolent(mild, relaxed, tolerant, laid-back, permissive) |
| indulgent(mild, relaxed, tolerant, laid-back, permissive) |
| inscrutable(adjective, quiet, cool, moderate, gentle) |
| insouciant(mild, relaxed, tolerant, laid-back, permissive) |
| invariable(calm, strong, solid, steady, substantial) |
| keeping a stiff upper lip(expression, adjective, idiom, calm, relaxed) |
| laid-back(adjective, calm, quiet, cool, smooth) |
| lasting(calm, strong, solid, steady, substantial) |
| lazy(mild, relaxed, tolerant, laid-back, permissive) |
| lenient(calm, easy, mild, relaxed, comfortable) |
| level headed |
| liberal(mild, relaxed, tolerant, laid-back, permissive) |
| listless(adjective, quiet, cool, moderate, gentle) |
| low-pressure(mild, relaxed, tolerant, laid-back, permissive) |
| massed |