资料来源 : Webster's Revised Unabridged Dictionary (1913)

Peaceable \Peace"a*ble\, a. [OE. peisible, F. paisible.]
   Begin in or at peace; tranquil; quiet; free from, or not
   disposed to, war, disorder, or excitement; not quarrelsome.
   -- {Peace"a*ble*ness}, n. -- {Peace"a*bly}, adv.

   Syn: Peaceful; pacific; tranquil; quiet; mild; undisturbed;
        serene; still.

   Usage: {Peaceable}, {Peaceful}. Peaceable describes the state
          of an individual, nation, etc., in reference to
          external hostility, attack, etc.; peaceful, in respect
          to internal disturbance. The former denotes ``in the
          spirit of peace;'' latter; ``in the possession or
          enjoyment of peace.'' A peaceable adjustment of
          difficulties; a peaceful life, scene.

资料来源 : WordNet®

peaceableness
     n : a state that is calm and tranquil [syn: {peacefulness}]