noun
endurance; perseverance; patience
A noun referring to the quality of enduring hardship or waiting calmly. Often used in contexts emphasizing mental fortitude or long-term effort.
彼の忍耐心には本当に感心する。
I really admire his patience.
この仕事を続けるには忍耐心が必要だ。
You need perseverance to keep doing this job.
我慢 is a common everyday word for putting up with something or self-restraint, often with a nuance of bearing discomfort. 忍耐心 is more formal and focuses on the enduring quality itself.
Compound of 忍耐 (にんたい, endurance) + 心 (しん, heart/mind). The exact historical derivation is uncertain, but the word is formed from established Sino-Japanese morphemes.