sedate, staid (adj)

characterized by dignity and propriety

grave, sedate, sober, solemn (verb)

dignified and somber in manner or character and committed to keeping promises

"a grave God-fearing man"; "a quiet sedate nature"; "as sober as a judge"; "a solemn promise"; "the judge was solemn as he pronounced sentence"

sedate, calm, tranquilize, tranquillize, tranquillise (verb)

cause to be calm or quiet as by administering a sedative to

"The patient must be sedated before the operation"

sedate (Verb)

to tranquilize by giving a sedative; to calm; to soothe; to induce sleep.

sedate (Adjective)

in a composed and temperate state.

Sedate

Sedation is the reduction of irritability or agitation by administration of sedative drugs, generally to facilitate a medical procedure or diagnostic procedure. Examples of drugs which can be used for sedation include isoflurane, diethyl ether, propofol, etomidate, ketamine, pentobarbital, lorazepam and midazolam.