P0342000 (plăk′ə-bəl, plā′kə-)adj. Easily calmed or pacified; tolerant.[Middle English, agreeable, from Old French, from Latin plācābilis, from plācāre, to calm; see plāk- in Indo-European roots.]plac′a·bil′i·ty n.plac′a·bly adv. ThesaurusSeeplacable