adjective
certain
SUR-tun/ˈsɜːrtn/
Not in doubt
The balanced scale makes the scientist certain that the weights are equal.
Etymology
Latin certus described what was fixed or settled, as well as what was beyond doubt. The selected meaning preserves the idea of a fact settled rather than still open to question.
In context
there is nothing outside to interfere with the Earth between now and tomorrow of course it might be doubted whether we are quite certain that there is nothing outside to interfere
More examples
- Her recovery is not yet certain.
- We need a certain answer before booking the trip.
- He becomes more certain of his decision after the meeting.
Forms
certain · more certain · most certain
certainty noun — freedom from doubt