If you don't know IPA symbols, this could be written in English as 'moonk'. Like the word 'monk', but with a 'oo' vowel, as in 'soot'.
(The vowel is slightly different than that 'oo' in English, but it is the closest to it.)
I'm not sure if English speakers pronounce it in an Anglicised way - perhaps they just say it like the English word 'munch'.
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