'Certain' in the Bible

He again definitely mentions a certain day, "To-day," saying long afterwards, by David's lips, in the words already quoted, "To-day, if you hear His voice, do not harden your hearts."

There remains nothing but a certain awful expectation of judgement, and the fury of a fire which before long will devour the enemies of the truth.

It is true that they disciplined us for a few years according as they thought fit; but He does it for our certain good, in order that we may become sharers in His own holy character.