彼は私憤に駆られて上司を告発した。
Driven by personal resentment, he denounced his boss.
政治家が私憤を晴らすために権力を使うべきではない。
Politicians should not use their power to settle personal grudges.
彼の批判は公憤ではなく、ただの私憤にすぎない。
His criticism isn't righteous indignation; it's nothing more than a personal grudge.