棱角的英文：
pien

Don't draw in your horns
不要把棱角磨掉。

Rasp off corners
将棱角锉掉

angular pediment
有棱角的三角墙饰

A square jaw/chin
棱角分明的下颌[下巴]

He was thin and angular.
他身材瘦削，棱角分明。

Angular forms, outlines, or corners
角形角形，角的轮廓或棱角

He had an angular face with prominent cheekbones.
他的脸棱角分明，颧骨突出。

You can round out the corners with sandpaper.
你可以用砂纸把棱角打磨光滑。

Take a piece of sandpaper and round off the edges of the frame.
拿张砂纸把框子上的棱角磨圆。

His craggy face was serious
他那张棱角分明的脸十分严肃。