Difference between buy, by and bye
to buy (verb): A synonym of “to purchase.” खरीदना
I want to buy a new watch.
bye (exclamation): This is a shortening of “goodbye.”
I’ve to go now, so bye for the time being.
by (preposition):
1) used to show the person or thing that does something:
The book is translated by a well known author.
2) used to show how something is done:
They travelled across Europe by car.
3) near or at the side of:
A small child stood sullenly by her side.