Where does “فش” come from?

فش (South Levantine Arabic) comes from Hijazi Arabic فيه, from Arabic فِيه — in him/it.

Ancestry of “فش”, step by step

فش traces back through two separate lines of ancestry.

via Hijazi Arabic فيه

StepLanguageWordMeaning
1Hijazi Arabicفيهthere is; in him, with him
2Arabicفِيهin him/it

via South Levantine Arabic ـش

StepLanguageWordMeaning
1South Levantine Arabicـش—
Every word from Arabic فِيه →Every word from Hijazi Arabic فيه →