| laid back(expression, gentle, sedate, amicable) |
| level-headed(calm, cool, unflappable) |
| limpid(adjective, smooth, comfortable) |
| long-suffering(adjective, calm, cool, indifferent, restrained) |
| low-key(adjective, quiet, cool, still, peaceful) |
| matter-of-fact(adjective, calm, cool, indifferent, philosophic) |
| matter of fact(expression, idiom, philosophic) |
| mild(adjective, quiet, cool, restrained, still) |
| motionless(adjective, quiet, cool, still, peaceful) |
| mum(adjective, silent, dazed, dumb, amazed) |
| mute(adjective, silent, dazed, dumb, astonished) |
| muzzled(silenced, whist, disimpassioned) |
| no-nonsense(adjective, calm, quiet, cool, sober) |
| not saying boo(expression, adjective, idiom, silent, dazed) |
| pacific(adjective, quiet, cool, still, peaceful) |
| pastoral(adjective, quiet, cool, still, peaceful) |
| pellucid(adjective, smooth, comfortable) |
| philosophic(adjective, calm, cool, indifferent, restrained) |
| phlegmatic(adjective, calm, cool, indifferent, philosophic) |
| practical(adjective, calm, reasonable, sensible, rational) |