A person who moves on his hands and knees crawls. This is the first form of mobility for a baby, but there are still reasons for a fully-formed adult to crawl.
Walter crawled through the grass, looking for a small piece of metal that he had dropped.
Workers had to crawl through the attic when installing insulation.
Renee’s baby is just learning how to crawl.
The last runner in the race was too weak to run or walk, so he crawled across the finish line.
A millipede crawled across the floor.
Someone crawled through an open window and stole some electronic equipment.
He’s crawling.
Sometimes a person who crawls does so figuratively (It’s not actual.)
Ned went crawling to his boss and begged him to take him back.
Don’t come crawling back if you leave us.
Sandra went crawling back to her parents after failing to find work in California.