An Etymological Dictionary of Astronomy and Astrophysics

To be firm in a demand or course; refuse to yield (Dictionary.com).

Etymology (EN): L. insistere “stand upon, dwell upon,” from → in- “upon” + sistere “take a stand,” → resist.

Etymology (PE): Daristâdan “to insist” (Dehxodâ), from dar-, → in-,

• istâdan “to stand,” → resist.