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taciturn
adjective /ˈtæsɪtɜːn,ˈtæsɪtɝn/
Silent; temperamentally untalkative; disinclined to speak.

The two sisters could hardly have been more different, one so boisterous and expressive, the other so taciturn and calm.

Syn: reticent, untalkative
Ant: garrulous, loquacious
See Also: tacit, tacitly, tacitness

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