Known
来自Big Physics
Old English cnāwan (earlier gecnāwan ) ‘recognize, identify’, of Germanic origin; from an Indo-European root shared by Latin ( g)noscere, Greek gignōskein, also by can1 and ken.
wiktionary
From Middle English knowen, from Old English cnāwen(past participle).
Morphologically know + -n.
etymonline
known (adj.)
mid-13c., knouen, "well-known, famous, notorious," past-participle adjective from know (v.). From early 14c. as "recognized, not secret; familiar, not strange." As a noun, "that which is known," by 1863; earlier "famous person" (1835). In Middle English it meant "one's acquaintances." To make (something) known is from mid-14c.
