Source : Webster's Revised Unabridged Dictionary (1913)

Impel \Im*pel"\, v. t. [imp. & p. p. {Impelled}; p. pr. & vb. n.
   {Impelling}.] [L. impellere; pref. im- in + pellere, pulsum,
   to drive. See {Pulse} a beat, and cf. {Impulse}.]
   To drive or urge forward or on; to press on; to incite to
   action or motion in any way.

         The surge impelled me on a craggy coast. --Pope.

   Syn: To instigate; incite; induce; influence; force; drive;
        urge; actuate; move.

Source : WordNet®

impelling
     See {impel}

impelling
     adj : markedly effective as if by emotional pressure; "impelling
           skill as a teller of tales"; "an impelling personality"

impel
     v 1: urge or force (a person) to an action; constrain or motivate
          [syn: {force}]
     2: cause to move forward with force; "Steam propels this ship"
        [syn: {propel}]
     [also: {impelling}, {impelled}]