nag
[For the right pronunciation, please click here.]

a nag, old and sick horse
(old usage) a horse that is old and in a poor health condition;
(slang usage) a race horse;
(old usage) a small riding horse
1.
nag (noun) = a person who keeps complaining or asking/telling somebody to do something, especially in an annoying way
2.
nagging = (of something or someone) making you worry or feel pain slightly all the time

nag/naag/naga/sarp (snake)
3.
to nag (verb) =
to keep asking someone about something in an annoying way [For an article in which we see this ‘nag’ used as a verb and in this sense, please click here. However, This spelling ‘nag’, with a long ‘a’ sound (nãg), is used to refer to a snake, especially a mythical snake in Hindu religion. For an article that explains the ‘Nag’ in Hindu scriptures, please click here.]
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