A curve.

“There's a sharp bend in the road ahead.”

Any of the various knots which join the ends of two lines.

(in the plural, underwater diving, with the) A severe condition caused by excessively quick decompression, causing bubbles of nitrogen to form in the blood; decompression sickness.

“A diver who stays deep for too long must ascend very slowly in order to prevent the bends.”

To cause (something) to change its shape into a curve, by physical force, chemical action, or any other means.

“Don’t bend your knees.”

To become curved.

“Look at the trees bending in the wind.”

To cause to change direction.