1la·ment 
/ləˈmɛnt/ verb
la·ments; la·ment·ed; la·ment·ing /ləˈmɛnt/ verb formal : to express sorrow, regret, or unhappiness about something [no obj] ▪ She lamented over the loss of her best friend. ▪ (chiefly US) He was lamenting about rising gasoline prices. [+ obj] ▪ She lamented (the fact) that she had lost her best friend. = She lamented having lost her best friend. = She lamented the loss of her best friend. ▪ “I've lost my best friend!” she lamented. — see also lamented
