|Origin:||tragelen, from tragel 'net pulled along behind', probably from Latin tragula; TRAIL1|
trawl1 [intransitive and transitive]
to search through a lot of documents, lists etc in order to find out information
I'll have to trawl through all my lecture notes again.
She spent the morning in the library, trawling for information for her project.
to fish by pulling a special wide net behind a boat