calm, quiet, or composed; undisturbed by passion or excitement

a sedate party; a sedate horse.

to put (a person) under sedation.

adjective

agitated , excitable , excited , lively , upset

adjective

cold sober , composed , cool , cool as cucumber , decorous , deliberate , demure , dignified , dispassionate , earnest , grave , imperturbable , laid-back * , no-nonsense , placid , proper , quiet , seemly , serene , serious , sober , solemn , somber , staid , steady , tranquil , unflappable , unruffled , calm , collected , drug , settled , still , subdued