mourn
definition
to feel or express deep sadness or grief, typically due to someone's death
example
The community gathered to mourn the loss of their beloved leader, who had dedicated his life to helping others.
synonyms
grievesorrowweep
word origin — Middle English 'mournen', from Old French 'morn(er)', from Latin 'mournere', from 'morari' meaning 'to delay, linger, grieve'.