Certain

/ˈsɜːrtn/
Certain means sure or confident, and also refers to a particular or some.

Examples

  • He avoided certain questions about his past.
  • I need certain supplies for the trip.
  • We will discuss certain topics at the meeting.
  • They felt certain about the project's success.
  • She mentioned certain details that were confidential.

Meanings

Sure

Confident that something is true or will happen.
From Latin certus meaning fixed or settled, which passed into Middle English as certain.

Examples

  • Certain people prefer coffee over tea.
  • She was certain that she had locked the door.
  • It is certain that the sun will rise tomorrow.
  • They felt certain about the project's success.
  • He answered certainly, leaving no doubt.

Some

Referring to a particular but unspecified amount or number.
Derived from the same Latin root certus, later used to indicate a specific but not identified thing.

Examples

  • I need certain supplies for the trip.
  • There are certain risks involved in climbing.
  • She mentioned certain details that were confidential.
  • We will discuss certain topics at the meeting.
  • He avoided certain questions about his past.
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