真っ暗
まっくら · makkura · JLPT N2 · na-adj
total darkness
🌑 真 = utterly + 暗 = dark, so まっくら means utterly dark: total darkness
真 is an intensifier, as in 真っ赤 (deep red) and 真っ白 (pure white). Here it boosts 暗 (dark) until only complete darkness is left.
真 — 匕 (spoon) over 目 (eye) over 八 (eight/base)
真 originally depicted a person or vessel used in ritual, conveying the idea of something genuine or true. Over time the form was reanalyzed as components like 匕, 目, and a base, but the core meaning of 'real, true, genuine' has remained stable since early bronze inscriptions.
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.'