The word “lament” means to express grief, sorrow, or regret. Some synonyms for “lament” are “mourn”, “bewail”, “grieve”, and “deplore”.
“Mourn” implies a deep and prolonged expression of sorrow. For example, “The family mourned the loss of their beloved patriarch.” This shows that the family is experiencing a profound sense of grief over the death of their respected elder.
“Bewail” suggests a more vocal and passionate expression of grief. “She bewailed her misfortunes to anyone who would listen.” Here, the person is loudly and emotionally expressing her troubles.
“Grieve” emphasizes the internal feeling of sorrow. “He grieved for months after the accident.” This indicates that he was deeply saddened by the event for a long time.
“Deplore” often implies disapproval as well as sorrow. “We deplore the violence that has erupted in the city.” This shows that people not only feel sad about the violence but also disapprove of it.