勾 - be bent, slope, capture

slope; incline; gradient; grade; pitch

contragradient method; conjugate gradient method; CG method

sloping ceiling

to kidnap

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

draft angle

detention pending trial; confinement; custody

nonlinear conjugate gradient method

uphill grade; upgrade

vanishing gradient problem (in machine learning)

arrest; custody; apprehending; abduction

summons; warrant of arrest