Where does “攘” come from?

攘 (Old Chinese) comes from Proto-Sino-Tibetan naŋ, from Proto-Sino-Tibetan na-ŋ — you.

Ancestry of “攘”, step by step

Step	Language	Word	Meaning
1	Proto-Sino-Tibetan	naŋ	inside
2	Proto-Sino-Tibetan	na-ŋ	you