n the sound of a sudden heavy fall
v drop sharply
v set (something or oneself) down with or as if with a noise
v make fat or plump
v give support (to) or make a choice (of) one out of a group or number
v. （使）圆胖( plump的第三人称单数 ); （使）鼓起; （使）突然沉重地落下; 有信心地选择