The antonyms of *allegiancy* are *disloyalty* and *treason*. While *disloyalty* refers to a general lack of loyalty or faithfulness, *treason* is a specific legal term that describes the crime of betraying one's country. Use these words in politics, relationships, and history to describe acts of betrayal and disloyalty.

회사에 대한 그의 *불충성*은 그가 경쟁업체에 기밀 정보를 유출했을 때 드러났습니다.

会社に対する彼の*不忠*は、彼が競合他社に機密情報を漏らしたときに明らかになりました。

His *disloyalty* to the company was revealed when he leaked confidential information to a competitor.

스파이는 국가 기밀을 외국 세력에 판매한 *반역죄*로 기소되었습니다.

スパイは、国家機密を外国勢力に売ったことに対する*反逆罪*で起訴されました。

The spy was charged with *treason* for selling state secrets to a foreign power.