Native speaker
In Emirati Arabic, “Ninety (90)” is تسعين (tis'een).
تسعين
Ninety (90)
Tap a highlighted letter for a tip on the sound.
It's in the phrasebook under Numbers, prices & money, with 36 more like it.
Source: DLIFLC Emirati Basic Language Survival Kit (2007). Credits and licences