Verb
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cause to be calm or quiet as by administering a sedative to
"The patient must be sedated before the operation"
Adjective
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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"
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characterized by dignity and propriety