the mind > emotion > suffering > sorrow or grief > lamentation or expression of grief > lamentation or expression of grief for death > express grief for death [verb (intransitive)] (4)
intransitive. To utter lamentations, etc., to someone. Also figurative.
Taken as a symbol of grief for unrequited love or the loss of a mate; esp. in phr. to wear (the) willow, to wear the willow garland (see compounds…