An Etymological Dictionary of Astronomy and Astrophysics

To perceive the meaning of.

Etymology (EN): M.E. understanden, understonden, O.E. understandan “comprehend, grasp the idea of,” probably literally “to stand in the midst of,” from → under- + standan “to stand,” cognate with Pers. istâdan, → standard.

Etymology (PE): Fahmidan, from Ar. fahm + infinitive suffix -idan.