An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) To call up or produce (memories, feelings, etc.).
2) To elicit or draw forth (Dictionary.com).

From Fr. évoquer or directly from L. evocare "call out, rouse, summon," from → ex- "out" + vocare "to call," → voice .

Zâvacidan, from zâ-, → ex-, + vacidan "to call," → convoke.

1) To take back or withdraw; annul, cancel, or reverse; rescind or repeal.
2) To bring or summon back (Dictionary.com).

M.E., from O.Fr. revoquer, from L. revocare "rescind, call back," from → re- "back," + vocare "to call," from vox, → voice.

Vâvacidan, from vâ-, → re-, + vacidan "to call," → convoke.