The kanji 概 primarily conveys the idea of "general," "outline," "overview," or "approximate." It suggests a broad understanding or a summary rather than a detailed, in-depth analysis. It often refers to a rough estimate or a general picture of something. It can also imply "generally" or "roughly speaking."

・On-yomi (音読み): ガイ (gai) ・Kun-yomi (訓読み): おおむね (ōmune)

⚫︎ 概要 (gaiyou) Translation: Outline; summary; overview ⚫︎ 概算 (gaisan) Translation: Rough estimate; approximation ⚫︎ 概して (gaishite) Translation: Generally; for the most part

The kanji 概 is a phono-semantic compound (形声文字, keisei moji). It is composed of the semantic component "木" (ki, meaning "tree" or "wood") and the phonetic component "既" (ki, suggesting the sound and also implying "already done" or "completed"). The original meaning of the character was likely related to having an overview of a forest or wood, as if one has "already seen" or "completed" an understanding of it. Over time, the meaning expanded to encompass more abstract concepts such as "general" or "outline."