Source : Webster's Revised Unabridged Dictionary (1913)

Sagely \Sage"ly\, adv.
   In a sage manner; wisely.

Source : WordNet®

sagely
     adv : in a wise manner; "she acted wisely when she invited her
           parents" [syn: {wisely}, {with wisdom}, {showing wisdom}]
           [ant: {foolishly}]