(of a person or an animal 人或动物 not easily excited or annoyed 温和的；平和的；文静的 a placid baby/horse 安静的婴儿；驯良的马 The cattle are placid, so easy to work with. 这群牛性情温顺，很容易饲养。
calm and peaceful, with very little movement 平静的；宁静的；安静的 the placid waters of the lake 平静的湖水
Word Originearly 17th cent.: from French placide, from Latin placidus, from placere ‘to please’.