v move stealthily
v insert inconspicuously or quickly or quietly
v move obliquely or sideways, usually in an uncontrolled manner
v get worse
v move smoothly and easily
v to make a mistake or be incorrect
v pass on stealthily
v move easily
v cause to move with a smooth or sliding motion
v pass out of one's memory
v move out of position
a. 打滑的