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repay (EN)
verb

verb “repay”

infinitive repay; he repays; past tense repaid; past part. repaid; ger. repaying
  1. to pay back money to someone you owe
    He promised to repay me the money I lent him last month.
  2. to give something back in return for someone's action; to return a favor; to reciprocate
    She repaid his generosity by helping him when he was in need.
  3. (of an action or effort) to be worth the time or effort; to pay off; to yield a rewarding result
    Spending time studying every day will repay you with better grades in the long run.