спокойный

1) General subject: Apollonian, adjusted, alcyon, as cool as a cucumber, calm, cannie, canny, cold (о цвете), collected, comfortable, comfy, composed, cool, cool headed, cool-headed, dispassionate, dormant, easeful, easy, easy going (о лошади), easygoing (о ходе лошади), equable, equal (о характере), equanimous, even (о характере), even minded, even-minded, fair, gentle, hasteless, impassive, imperturbable, indisturbable, inexplosive, inirritable, laid-back, laidback, leisurable, leisurely, level, level headed, level-headed, orderly, pacific, peaceable, peaceful, phlegmatic, phlegmy, placid, quiescent, quiet (о человеке), recollected, relaxed, reposed, reposeful, restful, sedate, self composed, self-composed, self-possessed, serene, settled, sleepful, smooth, sober (о красках), sober minded, sober-minded, soundless, steady, still, still-house, stirless, tranquil, unalarmed, unanxious, unblinking, unconstrained, undistempered, undisturbed, unflurried, unimpassioned, unperturbed, unruffled, untroubled, unvexed, unworried, waveless, well balanced, well-balanced, worriless, immovable, secure, soft, even-tempered, self-collected, idyll, unflustered, cold-minded

2) Naval: snug

3) Medicine: balanced, sound

4) Poetical language: stilly

5) Bookish: halcyon, imperturbed

6) Rare: placable, surgeless

7) Mathematics: at rest, latent

8) Railway term: silent

9) Diplomatic term: low-key

10) Metallurgy: dead (о состоянии металлической ванны)

11) Scottish language: douce

12) Jargon: together, zero cool (real), downbeat (I had sort of a downbeat day У меня был спокойный день.), grooving, groovy, in the groove, pretty, sitting pretty

13) Business: mild

14) Drilling: killed

15) Aviation medicine: kolytic

16) Makarov: alcyon (о погоде), calm (о море и т.п.), easy-going (о ходе лошади), halcyon (особенно о погоде), sound (о сне), steady (о ходе), still (о напитке), surgeless (о море), surgeless (о работе машины), tame (о корове и т.п.), waveless (без волн)

17) Scuba diving: calm (о море)