Betaacet بتاعت

Derived from the Coptic feminine relative possessive phrase ϯ-ⲧⲁⲓ / ⲑⲓ-ⲧⲁⲓ (ti-tai or thi-tai), which translates to "the female one belonging to..." which later became arabized.

The feminine Coptic Ti prefix merged with the Arabic feminine grammatical ending Taa Marbuta/Taa Maftuha (-et), giving us the exact structural formulation of بتاعت.