verb

Hi

In all my essay i have been asked to make change for some word in the sentence by using verb.So can i get correction in below mention sentence.
It rejuvenate us and sharpens are certain skills like obstacle breaking with time ?limit, sharps are brain.
Description: The fragment It rejuvenate us is rare
Suggestion: Possible agreement error: Replace rejuvenate with verb, past tense

How to replace rejuvenate word with verb.

Looking forward for corrected sentence.

sheetal