葉 - Wiktionary
Phono-semantic compound (形聲, OC *hljeb, *leb): semantic 艸 (“grass”) + phonetic 枼 (OC *leb, “flat”). Etymology[edit]. From Proto-Sino-Tibetan *s-lap (“leaf”). Cognate with Tibetan ལོ་མ (lo ma, “leaf”), Western Tibetan ལོབ་མ (lob ma, “leaf”). Related to 世 (