Etymograph > Indo-European > Old English > Dictionary > ge-cnǣwe

in agreement with, acknowledging

Source: Kroonen 2013:296
originates from: PGmc *knēi- "acknowledging" (knēi- > knāi > knāwi > knǣwi > knǣi > knǣ) through pgmc-to-oe
(source: Kroonen 2013:296)