five notes of pentatonic scale, roughly do, re, mi, sol, la
five classes of initial consonants of Chinese phonetics, namely: 喉音[hou2 yin1], 牙音[ya2 yin1], 舌音[she2 yin1], 齒音|齿音[chi3 yin1], 唇音[chun2 yin1]
Definitions (粵典–words.hk)
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Definitions (Wiktionary)
noun
the five classes of initial consonants of Chinese phonetics (喉音, 舌音, 齒音, 唇音, 牙音)
noun
the five notes of the Chinese pentatonic scale (宮, 商, 角, 徵, 羽, also called 合, 四, 乙, 尺, 工 after the Tang dynasty, equivalent to do, re, mi, sol, la in the Western solfège system or 1, 2, 3, 5, 6 in the Chinese numbered musical notation system)
Definitions (Kaifangcidian)
（沒有對應漢語詞彙）
Examples (Tatoeba—Mandarin-English)
Mandarin
他不知道他自己五音不全。
他不知道他自己五音不全。
tā bù zhī dào tā zì jǐ wǔ yīn bù quán 。