薄暗い

うすぐらい · usugurai · JLPT N2 · i-adj

dim

🕯️ 薄暗い = 薄 thin + 暗い dark: only thinly dark, so dim

薄 (usu-, thin/faint) + 暗い (kurai, dark); the k turns to g when joined (rendaku), giving usugurai. It means faintly dark: a dim room or a gloomy evening, not pitch black.

薄 — grass radical 艹 + 溥 (pǔ, phonetic)
薄 is a semantic-phonetic compound. The grass radical 艹 on top hints at the original meaning — thin, sparse vegetation or undergrowth. The lower part 溥 supplies the sound. From 'sparse plants' the meaning broadened to 'thin', 'slight', or 'meager' in general use.

暗 — sun 日 + sound 音 (phonetic)
暗 is a semantic-phonetic compound. The 日 (sun) component carries the meaning, suggesting absence of sunlight, while 音 (yīn, sound) provides the phonetic clue for the reading àn. Originally meaning 'dark' or 'dim,' it later extended to figurative senses like 'hidden' or 'secret.'

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