勾 - be bent, slope, capture

slope; incline; gradient; grade; pitch

vanishing gradient problem (in machine learning)

to kidnap

three sides of right triangle (minor cathetus, major cathetus and hypotenuse)

spatial gradient

draft angle

detention pending trial; confinement; custody

downhill grade; downgrade

large jewel; string of jewels

nonlinear conjugate gradient method

contragradient method; conjugate gradient method; CG method

sloping ceiling