The kanji 耐 conveys the meaning of enduring, withstanding, or tolerating something difficult or challenging. It suggests the ability to persevere through hardship, pain, or resistance. It implies resilience and the capacity to bear up under pressure. The core meaning focuses on the strength to resist or to remain unaffected by something.

・On-yomi (音読み): タイ (tai) ・Kun-yomi (訓読み): た（える） (ta(eru))

⚫︎ 忍耐力 Translation: Perseverance; stamina; tolerance; endurance ⚫︎ 耐える Translation: To endure; to bear; to withstand; to put up with ⚫︎ 耐久性 Translation: Durability; endurance; resistance (to wear and tear)

The kanji 耐 is a phono-semantic compound (形声文字, けいせいいもじ, *keisei moji*). The left side is a radical representing soil or earth (土, つち, *tsuchi*), and it provides the meaning component related to the idea of enduring something substantial or firm. The right side (而, しこうして, *shikoushite*, meaning "and then") is a phonetic component, indicating the sound (though the sound has evolved over time). The character visually represents the idea of standing firm, and enduring through changes over time.