The kanji 忍 primarily conveys the idea of endurance, perseverance, and forbearance. It signifies the ability to withstand hardship, pain, or difficult circumstances without giving in or revealing one's true feelings. It also encompasses concepts like stealth and concealment, reflecting the idea of enduring and remaining hidden.

・On-yomi (音読み): ニン (nin) ・Kun-yomi (訓読み): しの（ぶ） (shino(bu))

⚫︎忍耐 Translation: Patience; endurance. ⚫︎忍者 Translation: Ninja; a stealth agent or assassin. ⚫︎我慢する Translation: To endure; to put up with; to bear.