Cases of word usage

1) complicated; (of machinery etc) built with many parts and difficult to understand (intricate)

2) a skilled workman, especially one who repairs or adjusts machinery (mechanic)

3) (a building (flourmill) with) machinery or apparatus for grinding grain into flour (mill)

4) a torn place in cloth etc; (a) regular payment for the use of land, a building, offices, machinery etc (rent)

5) a kind of vehicle used for pulling agricultural machinery or other heavy equipment over rough ground (tractor)