How Do You Spell GRUBBLE?
Pronunciation: [ɡɹˈʌbə͡l] (IPA) 
The word grubble may seem like it’s spelt with an ‘r’ instead of an ‘l’, but the pronunciation reveals the explanation of its spelling. The IPA phonetic transcription for grubble is /ˈɡrʌb(ə)l/. The ‘r’ sound in the transcription is called a tapped or flapped ‘r’, which occurs when the tongue taps the alveolar ridge, creating a brief ‘d’-like sound. The tapped ‘r’ is common in American English and explains why the pronunciation of grubble sounds like it has an ‘r’ instead of an ‘l’.
