v declare invalid
v clear (a room, house, place) of occupants or empty or clear (a place or receptacle) of something
v take away the legal force of or render ineffective
v excrete or discharge from the body
a. 空的； （纹章图案）中空的
v. 使无效( void的过去式和过去分词 ); 宣布…作废; 取消; 排泄