An Etymological Dictionary of Astronomy and Astrophysics

To perceive with the eyes; look at.

Etymology (EN): M.E. seen, from O.E. seon “to see, look, behold, understand, know,” ultimately from PIE *sek^w- “to see, notice;” cognate with Du. zien “to see,” Ger. sehen “to see,” Danish, Swedish and Norwegian Bokmal se “to see,” L. signum “mark, token.”

Etymology (PE): Didan “to see, regard, catch sight of, contemplate, experience;” Mid.Pers. ditan; O.Pers. dī- “to see;” Av. dā(y)- “to see,” didāti “sees;” cf. Skt. dhī- “to perceive, think, ponder; thought, reflection, meditation,” dādhye; Gk. dedorka “have seen.”