Etnén اتنين

The Coptic Engine: In the Bohairic and Sahidic dialects of Coptic, the number "two" is Ⲥⲛⲁⲩ (Snau) for masculine objects, and Ⲥⲛ̄ⲧⲉ (Snte) or Ⲥⲛⲓϥ (Snif) for feminine objects depending on the dialect. [1]

The Phonetic Rule (Vowel Length & Tone): Look closely at how the Coptic number functions. It is a single, sharp, punchy syllable that relies on a front vowel ending in a heavy consonant glide (-én / -if / -te).

The Clash with Arabic: Modern Standard Arabic (MSA) forces a long, double-syllable, clunky word: Ith-nayn (اِثْنَان). It requires a dental Thaa (ث) sound that does not exist in native Egyptian phonology.

The Egyptian Twist: When forced to switch to Arabic, the bilingual Egyptian mouth flat-out refused the two-syllable Semitic Ith-nayn.

They dropped the foreign Thaa (ث) and replaced it with a clean, sharp dental T (ت).

They dragged the trailing vowel inward, shifting the diphthong (-ayn) into a smooth, singular, elongated mid-vowel "é" sound—the exact mid-vowel engine you are documenting in your script.

This effortlessly condensed the word into إتنين (etnén), matching the exact mono-syllable weight, bounce, and rhythm of the Coptic Ⲥⲛ̄ⲧⲉ / Ⲥⲛⲓϥ templates.