peaceful (adj.)

early 14c., pesful, peesfull, paisful, "inclined to peace, friendly, pacific;" mid-14c. as "tranquil, calm, full of peace;" from peace + -ful. In reference to nonviolent methods of effecting social change, it is attested from 1876. Related: Peacefully; peacefulness. Peaceful coexistence (1920) originally was in regard to Soviet policy toward the capitalist West.

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Definitions of peaceful from WordNet

peaceful (adj.)
not disturbed by strife or turmoil or war;
peaceful sleep
a far from peaceful Christmas
a peaceful nation
peaceful times
Synonyms: peaceable
peaceful (adj.)
peacefully resistant in response to injustice;
Synonyms: passive