Where does “readahead” come from?

readahead (English) comes from English ahead, from English head, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

readahead (English): The operation of reading data from a storage...

Definitions

  1. The operation of reading data from a storage...

Ancestry of “readahead”, step by step

readahead traces back through two separate lines of ancestry.

via English ahead

StepLanguageWordMeaning
1EnglishaheadIn or to the front; in advance; onward; In the...
2EnglishheadThe part of the body of an animal or human which...
3English-yAdded to nouns and adjectives to form adjectives...
4Middle English-yDesignates an adjective, in many cases formed by...
5Old English-iġ-y, -ic
6Proto-West Germanic-gForms adjectives from nouns and verbs with a...
7Proto-Germanic-gaz-y
8Proto-Indo-European-ḱos-y, -ic

via English read

StepLanguageWordMeaning
1EnglishreadTo look at and interpret letters or other...
2Middle Englishredento counsel, advise; to study; to read
3Old Englishrǣdanto read, interpret; to counsel, advise; plot,...
4Proto-West Germanicrādanto advise, counsel, help; to devise, decide,...
5Proto-Germanicrēdanąto decide, advise
6Proto-Indo-EuropeanHreh₁dʰ-to think; to arrange; to succeed, accomplish
7Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
8Proto-Indo-Europeanh₂er-to fit, to fix, to put together
Every word from Proto-Indo-European -ḱosEvery word from English -yEvery word from Old English -iġ