An Etymological Dictionary of Astronomy and Astrophysics

The final stage of mirror making, a process of altering the mirror’s shape into the one required for proper function. → grinding;
→ polishing.

Etymology (EN): Figuring, noun of → figure.

Etymology (PE): Šekldahi, “giving form,” from šekl, → figure + dahi, a verbal noun of dâdan “to give,” from
Mid.Pers. dâdan “to give,” O.Pers./Av. dā- “to give, grant, yield,” dadāiti “he gives;” cf. Skt. dadáti “he gives,” Gk. didomi “I give,” tithenai “to put, set, place;” L. dare “to give, offer;” facere “to do, to make;” Rus. delat “to do;” O.H.G. tuon, Ger. tun, O.E. don “to do.”
PIE base *dhe- “to put, to do.”