worm

Noun

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

• a software program capable of reproducing itself that can spread from one computer to the next over a network
  • worms take advantage of automatic file sending and receiving features found on many computers
    

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

• any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae

Verb

• to move in a twisting or contorted motion, (especially when struggling)
  • The prisoner writhed in discomfort
    
  • The child tried to wriggle free from his aunt's embrace
    

Related words

• Synonyms: 
  louse , insect , dirt ball , writhe , wrestle , wriggle , squirm , twist