Native speaker
In Emirati Arabic, “Open your mouth” is إفتح ثمك (iftah thim mak).
إفتح ثمك
Open your mouth.
Tap a highlighted letter for a tip on the sound.
It's in the phrasebook under At the doctor, with 251 more like it.
to a man
to a man
to a man
Source: DLIFLC Emirati Basic Language Survival Kit (2007). Credits and licences