The kanji 毅 primarily conveys the idea of firmness, resoluteness, and determination. It suggests strength of will, unwavering resolve, and a persistent spirit. It implies a character that is steadfast and doesn't easily give up in the face of challenges.

・On-yomi (音読み): キ (ki) ・Kun-yomi (訓読み): None, as the meaning is conveyed through the on-yomi.

⚫︎ 毅然（きぜん）とした態度 Translation: a firm attitude; a resolute attitude. ⚫︎ 剛毅（ごうき）な精神 Translation: a strong and resolute spirit. ⚫︎ 不屈の毅然さ Translation: indomitable resoluteness.

The kanji 毅 is a 形声文字 (keisei moji), a phono-semantic compound character. The phonetic component is 亥 (i, meaning "pig," but also used phonetically) and the semantic component is 木 (ki, meaning "tree" or "wood"). The original meaning may be related to the strength and resilience of wood. Over time, the meaning evolved to encompass the idea of firmness and determination, qualities associated with a strong and unyielding character.