The kanji 深 primarily conveys the idea of "deep," "profound," or "intense." It suggests something that extends far down, is not easily accessible, or has a significant degree of intensity or complexity. It can relate to physical depth, such as the depth of the ocean, or abstract concepts, like deep feelings or profound thoughts.

・On-yomi (音読み): シン (shin) ・Kun-yomi (訓読み): ふかい (fuka(i))

⚫︎深い海 Translation: Deep sea ⚫︎友情が深い Translation: Deep friendship; close friendship ⚫︎深く考える Translation: To think deeply

The kanji 深 is a phono-semantic compound (形声文字, けいせいもじ). It combines two parts: a water radical 氵 (san-sui, meaning "water") on the left, and the phonetic component ※ (音符, onpu) on the right, which represents a sound similar to シン (shin). The water radical indicates an association with water or liquids, and the phonetic component contributes to the pronunciation. The original meaning likely related to the depth of water, and then extended to represent depth in other contexts.