To cause disappointment
To deprive of contentment; to make uneasy; to dissatisfy.
(Intransitive) To reduce one's level of effort.
To cause unhappiness by failing to satisfy the hopes, desires, or expectations of
Find another word for disgruntle. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for disgruntle, like: disappoint, discontent, dissatisfy, let down and happy.