worm
Definitions
A small, slender, soft-bodied invertebrate animal that typically lacks limbs and moves by creeping or crawling.
A computer program that replicates itself in order to spread to other computers, often causing damage to data or systems.
To move or progress in a slow, sinuous, or stealthy manner.
Examples
The early bird catches the worm.
He spent the afternoon digging in the garden to find a worm for fishing.
The computer virus acted like a worm, spreading rapidly through the network.