1To conceal oneself; to hide or lie low so as not to be found.
敵に見つからないように茂みに忍んだ。
He slipped into the bushes to avoid being seen by the enemy.
彼女は病気のことを人に忍ばせていた。
She kept her illness hidden from others.
古い物語では『忍ぶ者』という表現がよく出てくる。
In old tales, the expression 'a person who hides' often appears.
2To endure or bear (pain, sadness, anger, etc.); to suffer quietly.
出発の悲しみを胸に忍んで、彼は黙って家を出た。
Keeping the sadness of departure in his heart, he left the house silently.
痛みを忍んで最後まで競技を続けた。
He endured the pain and continued the competition to the end.
悲しみを忍ぶことは簡単ではないが、時間が癒すこともある。
Enduring sorrow isn't easy, but time can sometimes heal.