By

How to spell by

2 letters · 1 syllable

How to pronounce by

What does by mean?

1. prepositionIndicating the agent, means, route, location, or deadline associated with an action.
2. adverbPast or aside, indicating movement nearby or the setting aside of something.

By in a sentence

• preposition

  The report was written by the finance team.

• adverb

  The years seemed to slip by far too quickly.

• preposition

  She travels to work by train every morning.

• adverb

  She set a little money by for emergencies each month.

Where does by come from?

Language of origin: Germanic

This little word comes straight from Old English 'bi' (also spelled 'be'), meaning 'near', 'beside', or 'about', and it traces back further to a shared Germanic ancestor that also gave German 'bei' and Dutch 'bij'. In its earliest use it pointed to physical nearness, the idea of being right alongside something, and that core sense of proximity still survives in phrases like 'stand by the door'. Over the centuries it spread outward to mark the agent of an action ('written by hand'), a means or route ('travel by train'), and a deadline ('finished by noon'). The same root is buried inside ordinary words such as 'beside', 'between', and even 'about', where the old 'b' element still carries the notion of position. Because it is so short and shares its sound exactly with 'buy' and 'bye', the spelling trap is purely about choosing the right one of three identical-sounding words.

How the word is built

• by (Old English bi: near, beside, about), an unanalysable single morpheme with no prefix or suffix

Words that sound like by

They sound the same but mean different things, so the meaning decides which spelling to write.

• buy: To obtain something in exchange for money.
• bye: A casual way of saying goodbye when parting from someone.