comb
Word family
Synonym discussion
Sense: verb/2
All four verbs describe trying to find something, but they differ in intensity, method, and scope. 'Search' is the most general word — it simply means looking for something and can be used for any situation ('search the house for keys'). 'Comb' adds a sense of thorough, systematic coverage: you check every part of a place just as a comb passes through every strand of hair ('the police combed the entire park'). 'Scour' is even more intense than 'comb' and often implies speed or urgency alongside thoroughness ('they scoured the coastline before dark'). 'Sift through' is different — it works best with collections of things rather than physical spaces, suggesting you examine each item one by one ('sift through a pile of documents'). Use 'comb' when you want to stress that no corner was left unchecked, and 'scour' when urgency is part of the picture.
Common collocations
Etymology
The word 'comb' comes from Old English 'camb', which traces back to the Proto-Germanic '*kambaz', meaning a toothed tool for hair. This Germanic root came from an even older Proto-Indo-European source '*gombhos', meaning 'tooth' or 'something with teeth'. The basic meaning has remained stable for over a thousand years: a tool with teeth used for arranging hair. The same ancient root appears in the Greek 'gōmphos' (a tooth or peg) and in the Sanskrit 'jambha' (tooth or tusk). The figurative sense 'search thoroughly' developed in English in the 1800s from the idea of running a comb through every part of something.
First known use
12th century
12th century, in the meaning defined at sense 1a Verb