Source : Webster's Revised Unabridged Dictionary (1913)

Supple \Sup"ple\, a. [OE. souple, F. souple, from L. supplex
   suppliant, perhaps originally, being the knees. Cf.
   {Supplicate}.]
   1. Pliant; flexible; easily bent; as, supple joints; supple
      fingers.

   2. Yielding compliant; not obstinate; submissive to guidance;
      as, a supple horse.

            If punishment . . . makes not the will supple, it
            hardens the offender.                 --Locke.

   3. Bending to the humor of others; flattering; fawning;
      obsequious. --Addison.

   Syn: Pliant; flexible; yielding; compliant; bending;
        flattering; fawning; soft.

Supple \Sup"ple\, v. t. [imp. & p. p. {Suppled}; p. pr. & vb. n.
   {Suppling}.]
   1. To make soft and pliant; to render flexible; as, to supple
      leather.

            The flesh therewith she suppled and did steep.
                                                  --Spenser.

   2. To make compliant, submissive, or obedient.

            A mother persisting till she had bent her daughter's
            mind and suppled her will.            --Locke.

            They should supple our stiff willfulness. --Barrow.

Supple \Sup"ple\, v. i.
   To become soft and pliant.

         The stones . . . Suppled into softness as they fell.
                                                  --Dryden.

Source : WordNet®

supple
     v : make pliant and flexible; "These boots are not yet suppled
         by frequent use"

supple
     adj 1: gracefully slender; moving and bending with ease [syn: {lissome},
             {lissom}, {lithe}, {lithesome}, {slender}, {svelte},
            {sylphlike}]
     2: (used of e.g. personality traits) readily adaptable; "a
        supple mind"; "a limber imagination" [syn: {limber}]
     3: (used of persons' bodies) capable of moving or bending
        freely [syn: {limber}]