sedate
[adjective]
Synonyms: calm, collected, composed, cool, dignified, serene, tranquil

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Antonyms: flighty
Contrasted words: indecorous, undignified, unseemly, airy, flippant, light
Related Words: calm, placid, serene, tranquil, collected, composed, dispassionate, imperturbable, unruffled, decorous, dignified, proper, seemly

[TahlilGaran] English Synonym Dictionary ▲

I. se‧date¹ /sɪˈdeɪt/ adjective
[Date: 1600-1700; Language: Latin; Origin: past participle of sedare 'to make calm']

1. calm, serious, and formal:
a sedate seaside town
The wedding was rather a sedate occasion.

2. formal moving slowly and calmly:
We continued our walk at a sedate pace.
—sedately adverb

[TahlilGaran] Dictionary of Contemporary English ▲

II. sedate² verb [transitive often passive]
[Date: 1900-2000; Origin: sedative]
to give someone drugs to make them calm or to make them sleep:
He was still in shock, and heavily sedated.

[TahlilGaran] Dictionary of Contemporary English ▲