| free and easy(expression, idiom, mild, relaxed, permissive) |
| grave |
| halcyon(adjective, calm, quiet, cool, mild) |
| hang-loose(mild, relaxed, tolerant, laid-back, permissive) |
| happy-go-lucky(mild, relaxed, tolerant, laid-back, permissive) |
| hard as nails(expression, adjective, idiom, calm, cool) |
| immovable(adjective, calm, cool, firm, solid) |
| importunate |
| independent |
| indolent(mild, relaxed, tolerant, laid-back, permissive) |
| indulgent(adjective, calm, quiet, mild, relaxed) |
| inscrutable(adjective, quiet, cool, moderate, gentle) |
| insouciant(mild, relaxed, tolerant, laid-back, permissive) |
| judicious(calm, sound, reasonable, sensible, rational) |
| keeping a stiff upper lip(expression, adjective, idiom, calm, relaxed) |
| laid-back(adjective, calm, quiet, cool, moderate) |
| lazy(mild, relaxed, tolerant, laid-back, permissive) |
| leisurely |
| lenient(adjective, calm, quiet, mild, relaxed) |
| liberal(mild, relaxed, tolerant, laid-back, permissive) |