assure/ensure/insure

Usage Glossary: A B C D E F G H I K L M N O P Q R S T U V W Y

assure/ensure/insure

Assure means "to reinforce the likelihood that somethingis attained" or "to state convincingly." Ensure means"to make certain." Insure means "to guarantee monetaryreplacement in case of loss."

The use of a spectroscope assured us of ahigh level of accuracy.

The operator must ensure that Valves A and Bare never open at the same time.

We insured the instrument for five thousanddollars.

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