1to drop off; to fall off; (of hair, teeth etc) to fall out
2to omit (a character when writing)
Examples
qiáng墙shàng上de的zhǐ纸jiàn jiàn渐渐tuō luò脱落le了。
墙上的纸渐渐脱落了。
The paper was beginning to peel off the walls.
油漆从墙上脱落。
The paint was coming off the wall.
这颗钮扣脱落了。
The button came off.