Cer"tain, adv. Certainly. [Obs.] Milton.
Cer"tain*ly, adv. Without doubt or question; unquestionably.
Cer"tain*ness, n. Certainty.
Cer"tain*ty (?), n.; pl. Certainties (#). [OF. certainetÚ.] 1. The quality, state, or condition, of being certain.
The certainty of punishment is the truest security against crimes.
Fisher Ames.