械 contraption

A KITE is a simple contraption.

I admonish you to always cut down trees with a contraption - don't use your teeth, dummy!

machine ★★★★★
機 (machine) + 械 (contraption) = 機械 (machine)

A machine, particularly something with a motor in it which moves when activated. A computer is not a 機械 , but a robot arm is.

mechanization ★☆☆☆☆
機械 (machine) + 化 (transform) = 機械化 (mechanization )

the mechanization of a society or of an industry.