boast your confidence vs bolster your confidence : Common Errors in English

About boast your confidence vs bolster your confidence

A bolster is a large pillow, and when you bolster something you support it as if you were propping it up with a pillow. Thus the expression is “bolster your confidence.” People unfamiliar with the word sometimes say instead “boast your confidence.” They may also be confusing this saying with “boost your confidence.”
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