The kanji 厚 primarily conveys the idea of "thick," "dense," or "deep." It can describe physical thickness, the richness or intensity of something, or a feeling of kindness or generosity. The core meaning revolves around a substantial amount or degree of something.

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

⚫︎ 厚い本 Translation: A thick book. ⚫︎ ご厚意に感謝します Translation: I appreciate your kindness (lit: I am grateful for your thick/great kindness). ⚫︎ 厚化粧 Translation: Heavy makeup (lit: thick makeup).

(Assuming the user's native language is Vietnamese) Kanji and Vietnamese have a high degree of correspondence. The kanji 厚 corresponds to the Sino-Vietnamese word 厚 hậu. Some modern Vietnamese words derived from Sino-Vietnamese (漢越語) that share the same origin as this kanji: ⚫︎ đày hậu (abundant, generous) ⚫︎ hậu đãi (to treat well, be generous)

The kanji 厚 is a phono-semantic compound (形声文字). It is composed of the semantic component "厂" (がんだれ gandare, a cliff) and the phonetic component "子" (こ ko, meaning child). The "厂" component suggests a shelter or place, while the "子" component (here used phonetically) hints at the sound and possibly the idea of something substantial. Over time, the character evolved to represent the idea of something thick or abundant, metaphorically extending to describe kindness or depth of feeling.