Pronunciation: [ɡɹˈʌmbə͡l] (IPA)
Correct spelling for the English word "grumbl" is [ɡɹˈʌmbə͡l], [ɡɹˈʌmbəl], [ɡ_ɹ_ˈʌ_m_b_əl] (IPA phonetic alphabet).
Correct spelling for grumbl