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undergo
O.E.
undergan
"undermine," from
under
+
gan
(see
go
). Cf. M.Du.
ondergaen
, O.H.G.
untarkun
, Ger.
untergehen
, Dan.
undergaa
. Sense of "submit to, endure" is attested from c.1300. Meaning "to pass through" (an alteration, etc.) is attested from 1634.