Threnodic is a word that describes something that is related to or expresses grief or mourning. Synonyms for the word threnodic include mournful, sorrowful, lamenting, elegiac, plaintive, and dirge-like. These words all describe something that is sad or sorrowful, and they can be used to describe music, poetry, or any kind of art that is meant to evoke feelings of mourning or grief. Threnodic can also be used to describe a person who is grieving, so synonyms for this usage might include mournful, sorrowful, bereaved, and grief-stricken. Overall, threnodic is a powerful word with many different synonyms that can be used to convey a wide range of emotional states.