Is lament an adjective or a verb?

"Lament" can be both an adjective and a verb, depending on how it's used.

Verb: To express sorrow or grief.

* Example: "She lamented the loss of her pet."

Adjective: Expressing sorrow or grief.

* Example: "The lamenting cries of the mourners echoed through the cemetery."

Here's a tip to remember: if you're unsure, try replacing the word with "sorrowful." If it makes sense, it's likely an adjective.