The reading けんいづけ (ken'i-zuke) combines the On'yomi 権威 (ken'i) with the attached form of 付ける (tsukeru), which typically becomes づけ in compounds. It is not けんいつけ or けんいずけ. This term signifies the act of authorizing, validating, or legitimizing something by bestowing authority upon it.

権威（ケンイ）と「付け（づけ）」が合わさった言葉です。「づけ」は連濁によるものです。物事に正当性や権限を与える行為を指します。