disgruntle

From dis- (intensifier) +‎ gruntle (“grumble, grunt”).

• IPA^(key): /dɪsˈɡɹʌnt(ə)l/

disgruntle (third-person singular simple present disgruntles, present participle disgruntling, simple past and past participle disgruntled)

1. (transitive, obsolete) To make discontent or cross; to put in a bad temper.

• disgruntlement
• regruntle

• grunt
• gruntle

• delustring