The kanji 要 primarily conveys the idea of "need," "necessity," "essential," or "important." It signifies something that is crucial, indispensable, or a core requirement. It can also imply the need for something or the key element of a situation.

・On-yomi (音読み): ヨウ (yō) ・Kun-yomi (訓読み): いる (iru) - to need; かなめ (kaname) - the key; the core

⚫︎ 重要（じゅうよう） Translation: Important; significant. ⚫︎ 必要（ひつよう） Translation: Necessary; essential; need. ⚫︎ 要（かなめ） Translation: The key point; the crux; the essential part.

The kanji 要 is a pictograph. It depicts a "waist" or "loin" of a person. The original meaning was related to the importance of the waist in supporting the body, thus evolving to represent "essential" or "important". Over time, the character has been simplified, but the core meaning of centrality and necessity has remained.