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 10 synonyms, antonyms, idiomatic expressions, and related words for disgruntle, like: disappoint, discontent, dissatisfy, let down, happy, annoyed, pissed-off, frustrated, despondent and embarassed.