From Proto-Loloish *C-sakᴸ (Bradley), from Proto-Sino-Tibetan. Cognate with Nuosu ꌗ (sot, “breath”), Burmese အသက် (a.sak), Chinese 息 (OC *sək), Yakkha सोक्मा (sokma, “breath”), Drung saq (“sound, voice, breath”).
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