"sedate" in the verb sense
1. sedate, calm, tranquilize, tranquillize, tranquillise
cause to be calm or quiet as by administering a sedative to
"The patient must be sedated before the operation"
"sedate" in the adjective sense
1. sedate, staid
characterized by dignity and propriety
2. grave, sedate, sober, solemn
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"
Source: WordNet® (An amazing lexical database of English)
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