certain
Translation
certain, sure, particular
Examples
I am certain that he is right.
I am certain that he is right.
A certain person told me the secret.
A certain person told me the secret.
It is certain to rain tomorrow.
It is certain to rain tomorrow.
Grammar Patterns
((be certain that ...)) to be completely sure of something. I am certain that he will come.
((be certain about sth.)) to have no doubt about something. Are you certain about the time?
((a certain + noun)) used to refer to a particular person or thing without naming them. A certain friend of mine called me.
Similar Words
Synonyms: sure, definite, positive; Antonyms: uncertain, doubtful
Etymology
From Latin 'certus' meaning 'sure, settled'.
Memory Tips
If you are 'certain', you can 'certify' that it's true.