五音

五音	wǔ yīn	five notes of pentatonic scale, roughly do, re, mi, sol, la / five classes of initial consonants of Chinese phonetics, namely: 喉音, 牙音, 舌音, 齿音, 唇音
五	wǔ	five / 5
音	yīn	sound / noise / note (of musical scale) / tone / news / syllable / reading (phonetic value of a character)