Seen
来自Big Physics
Old English sēon, of Germanic origin; related to Dutch zien and German sehen, perhaps from an Indo-European root shared by Latin sequi ‘follow’.
wiktionary
Morphologically see + -n.
From Arabic سِين (sīn)
etymonline
seen
Middle English sein, from Old English gesegen, gesewen, past participle of seon (see see (n.)). From c. 1200 as "perceived, discovered." To have seen everything as a hyperbolic expression of astonishment is from 1941.
When you have seen one of their Pictures, you have seen all. [Blake, c. 1811]
