棱角 (léng jiǎo): ขอบและมุม

This stone has been washed by the river for a long time, and its edges and corners have been worn smooth.

After years of workplace training, his originally sharp edges and corners were gradually worn smooth, and he became more tactful.

The edges and corners of the newly bought furniture are too sharp; if there are children at home, it's best to wrap them with soft pads.