Source : Webster's Revised Unabridged Dictionary (1913)

Acquiescent \Ac`qui*es"cent\, a. [L. acquiescens, -centis; p.
   pr.]
   Resting satisfied or submissive; disposed tacitly to submit;
   assentive; as, an acquiescent policy.

Source : WordNet®

acquiescent
     adj : willing to carry out the orders or wishes of another without
           protest; "too acquiescent to challenge authority"; "a
           gentle and biddable soul"; "children compliant with the
           parental will" [syn: {biddable}, {compliant}]