quyến rũ

Etymology
The now obsolete form is quite sufficiently attested, notably in the Southern dialects that did not have the ‹r-›-‹d-› merger. The second element most likely being a.

The form rũ might be a result of hypercorrection due to the merger ‹r-›-‹d-› in the inland Northern dialects, with the new spelling then spread and adopted in the dialects where the merger did not occur.

Verb

 * 1) to seduce; to charm; to captivate

Adjective

 * 1) charming; captivating
 * 2) (sexually, physically, romantically) attractive