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

To insert (an extra day, month, etc.) in the calendar to make it follow the seasons or moon phases.

From L. intercalatus p.p. of intercalare "to proclaim the insertion of an intercalary day or month," from → inter- + calare "to proclaim, announce solemnly;" → calendar.

Andarhelidan, andarheštan "to insert," from andar-→ inter- + helidan, heštan "to place, put" from Mid.Pers. hištan, hilidan "to let, set, leave, abandon," Parthian Mid.Pers. hyrz; O.Pers. hard- "to send forth," ava.hard- "to abandon;" Av. harəz- "to discharge, send out; to filter;" hərəzaiti "releases, shoots;" cf. Skt. srj- "to let go or fly, throw, cast, emit, put forth;" Pali sajati "to let loose, send forth."