The Collaborative International Dictionary of English v.0.48:

Implore \Im*plore"\, v. t. [imp. & p. p. Implored; p. pr. &
   vb. n. Imploring.] [L. implorare; pref. im- in + plorare to
   cry aloud. See Deplore.]
   To call upon, or for, in supplication; to beseech; to pray
   to, or for, earnestly; to petition with urgency; to entreat;
   to beg; -- followed directly by the word expressing the thing
   sought, or the person from whom it is sought.
   [1913 Webster]

         Imploring all the gods that reign above. --Pope.
   [1913 Webster]

         I kneel, and then implore her blessing.  --Shak.

   Syn: To beseech; supplicate; crave; entreat; beg; solicit;
        petition; prey; request; adjure. See Beseech.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Imploring \Im*plor"ing\, a.
   That implores; beseeching; entreating. -- Im*plor"ing*ly,
   adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

imploring
    adj 1: begging [syn: beseeching, pleading, imploring]
           [ant: imperative]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "imploring":
   adjuration, adjuratory, adorant, adoring, appeal, appealing,
   begging, beseeching, beseechment, bid, call, clamor, cry,
   devotional, devout, entreating, entreaty, imploration, imprecation,
   in the dust, invocation, invocatory plea, obsecration, obtestation,
   on bended knee, plea, pleading, prayer, prayerful, precative,
   precatory, prostrate before, reverent, reverential, rogation,
   solemn, suit, suppliant, supplicant, supplication, supplicatory,
   venerational, venerative, worshipful, worshiping