say it: uhn-uh-PREE-shee-ay-tid
unappreciated is an adjective meaning "not likely to be rewarded". It carries 2 recorded senses.
not likely to be rewarded
“grading papers is a thankless task”
Definitions, synonyms and semantic relations for unappreciated come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.