crawler
Meaning
a person or animal that moves on their hands and knees or with their body close to the ground.
a computer program that systematically browses the internet, typically for the purpose of web indexing.
a slow-moving vehicle or piece of machinery designed for rough terrain.
Structure
Usage
the baby was a fast crawler and could cross the room in seconds.
the search engine uses a web crawler to discover and index new pages.
the construction site used a large tracked crawler to move heavy materials over the muddy ground.
Etymology
the word 'crawler' is a transparent english formation, combining the verb 'crawl' with the agentive suffix '-er'. the verb 'crawl' itself entered middle english from old norse, likely from a root imitative of slow, laborious movement. the '-er' suffix, of germanic origin, is one of the most productive in english for creating nouns that denote an entity associated with an action. thus, a 'crawler' logically signifies one who or that which crawls, a meaning that has seamlessly extended from biological entities to describe slow vehicles and, metaphorically, automated internet browsing programs.
Analysis
- crawl: from middle english crawlen, of scandinavian origin; related to swedish kravla. the verb denotes the action of moving slowly. - er: from old english -ere, a suffix forming agent nouns indicating a person or thing that performs an action.