The kanji 厚 primarily conveys the idea of "thick," "deep," or "generous." It implies a substantial amount, either physically (thickness) or figuratively (depth of feeling or generosity). It can describe the physical thickness of an object, or it can also be used metaphorically to describe a person's character or the intensity of an emotion.

・On-yomi (音読み): コウ (kō) ・Kun-yomi (訓読み): あつ（い） (atsu(i))

⚫︎ 厚い本 (atsui hon) Translation: A thick book ⚫︎ 友情が厚い (yūjō ga atsui) Translation: Deep friendship; A strong friendship. ⚫︎ ご厚意に感謝します (go kōi ni kansha shimasu) Translation: I appreciate your kindness.

The kanji 厚 is a phono-semantic compound (形声文字, keisei moji). The left side is a radical called 厂 (ガン, gan), which depicts a cliff or shelter. The right side is a phonetic component that provides the sound, and the original meaning related to a large piece of meat. Over time, the meaning broadened to encompass the concept of thickness and depth.