Welk v. i. [imp. & p. p. Welked p. pr. & vb. n. Welking.] To wither; to fade; also, to decay; to decline; to wane. [Obs.]
When ruddy Ph░bus 'gins to welk in west. --Spenser.
The church, that before by insensible degrees welked and impaired, now with large steps went down hill decaying. --Milton.