Worm

any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes

a person who has a nasty or unethical character undeserving of respect

a software program capable of reproducing itself that can spread from one computer to the next over a network

screw thread on a gear with the teeth of a worm wheel or rack

to move in a twisting or contorted motion, (especially when struggling)