Insure vs. Ensure

Strictly speaking, the verb insure means to “pay a third party to protect against financial loss,” and ensure means “to make sure” or “make certain” that something occurs. For centuries, however, these words were used interchangeably. The hair-splitting distinctions between the two were the late creations of self-appointed grammarians in the mid-19th century. Insure, ensure, and assure all have roots in the Latin word sēcūrus, meaning “secure.”. This is part of a complete episode.

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