Source : Webster's Revised Unabridged Dictionary (1913)

Entreatingly \En*treat"ing*ly\, adv.
   In an entreating manner.

Source : WordNet®

entreatingly
     adv : in a beseeching manner; "`You must help me,' she said
           imploringly" [syn: {beseechingly}, {importunately}, {imploringly},
            {pleadingly}]