1. calm, sedate, tranquilize, tranquillise, tranquillize

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

Example Sentences:
'The patient must be sedated before the operation'

Synonyms

• calm
• tranquilize
• tranquillise
• tranquillize

2. sedate, staid

characterized by dignity and propriety

Synonyms

• staid

3. grave, sedate, sober, solemn

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

Example Sentences:
'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'

Synonyms

• grave
• sober
• solemn