The kanji 薄 primarily conveys the idea of "thin," "weak," "pale," or "faint." It implies a lack of density, intensity, or substance. It can be applied to physical objects, emotions, flavors, and more.

・On-yomi (音読み): ハク (haku) ・Kun-yomi (訓読み): うす-い (usu-i) - thin, weak, faint; うす-める (usu-meru) - to dilute, to thin; すすき (susuki) - pampas grass

⚫︎薄い本 Translation: A thin book. ⚫︎味が薄い Translation: The taste is weak/bland. ⚫︎薄暗い部屋 Translation: A dimly lit room.

The kanji 薄 is a phono-semantic compound (形声文字, けいせいもじ). The semantic component is 艹(くさかんむり) meaning "grass" or "plants," indicating something related to plants. The phonetic component is 尃 (fu), which originally depicted a type of woven mat. The mat could appear "thin" or "sparse." Therefore, the original meaning of 薄 was likely related to sparse plant growth or something that was spread thinly like a mat. Over time, its meaning expanded to encompass thinness, weakness, and faintness in general.