lament over (someone or something)
To grieve for someone or something; to be full of sorrow because of someone or something. I know you miss him, but you need to stop lamenting over Jonathan and start living your life again. People lamenting over the results of the election need to get ahold of themselves. This is not the end of the world as we know it.
lament over someone or somethingand lament (for) someone or something
to sorrow over someone or something. There is no need to lament over Sam. There is nothing that crying will do for him now. She is still lamenting for her cat.