Proto-Sino-Tibetan *lak ~ C-jak

→ Tibetan ལག (inherited)

→ Tibetan ཕྱག (inherited)

→ Pela laʔ³¹ (inherited)

→ Lashi lò (inherited)

→ Burmese လက် (inherited)

→ Namuyi lä̆qä̆ (derived)

→ Tangam arak (inherited)

→ Tangam laʔki (derived)

→ Tangut 𗁅 (inherited)

→ Chinese 翼 (inherited)

→ Chinese 翼 (cognate)