10 letters · 15 points in Scrabble
verb belittle
verb lower the value of something
verb lose in value
originInherited from Middle English depreciaten, borrowed from Late Latin dēpretiātus / dēpreciātus, perfect passive participle of dēpretiō / dēpreciō (see -ate (verb-forming suffix)), from dē- + pretium (“price”) + -ō.
Etymology from Wiktionary, CC BY-SA 3.0