【词根含义】：高兴,安慰
【词根来源】：来源于拉丁语动词plac.o, plac.are, plac.avi, plac.atus(平静,满足)和plac.eo, plac.ere, plac.ui, plac.itus(高兴,满足)。
【同源单词】：placable, placate, pleasant, please, pleased