The Collaborative International Dictionary
Waymented
Wayment \Way"ment\, v. i. [imp. & p. p. Waymented; p. pr. & vb. n. Waymenting.] [OE. waymenten, OF. waimenter, gaimenter, guaimenter, from wai, guai, woe! (of Teutonic origin; see Woe) and L. lamentari to lament. See Lament.] To lament; to grieve; to wail. [Written also waiment.]
Thilke science . . . maketh a man to waymenten.
--Chaucer.
For what boots it to weep and wayment,
When ill is chanced?
--Spenser.
Wiktionary
waymented
vb. (en-past of: wayment)