be certain of (something)

To be sure about something; to know something definitively. Are you certain of the train's departure time? No, the stove is off, I'm certain of it—I double-checked it myself. I'm not certain of much in life, but I know I love you, Rose.

See also: certain, of

See also:

be certain
treat (someone or something) like (someone or something else)
treat like
certain sure
extol
extol (someone or something) as (something)
extol as
extoll
certain
go on the prowl

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