expression, godan verb (-ru)
remain faithful; keep one's chastity
Used for marital fidelity or loyalty to a lover; often carries a traditional, somewhat formal tone.
彼女は夫の死後も貞節を守り続けた。
She remained faithful to her husband even after his death.
昔の武士の妻は、夫
Wives of samurai in the past were expected to remain faithful to their husbands.