Where does “מוֹתָא” come from?

מוֹתָא (Aramaic) comes from Aramaic מַוְתָּא.

Ancestry of “מוֹתָא”, step by step

Step	Language	Word	Meaning
1	Aramaic	מַוְתָּא	—

מוֹתָא — Etymology, Origin & Word History | Etymology Explorer