Refers to a lack of loyalty or faithfulness, often in relationships, duty, or allegiance. Can be used as a noun or adjectival noun (不忠な).
I cannot forgive his disloyal act.
Disloyalty destroys trust.
不忠 describes disloyalty or treachery, the direct opposite of the faithful devotion expressed by 忠実.
不忠 means disloyalty or treachery, the direct opposite of the faithful devotion expressed by 忠義.
Standard kanji spelling for disloyalty or infidelity.
Compound of 不 (fu, 'not') and 忠 (chū, 'loyalty'). The kanji combination directly conveys the meaning of disloyalty or infidelity.