difference between reject, refuse, and deny

reject - (үл оошоох, үл зөвшөөрөх, үл тоомсорлох) 'refuse' has a sense of saying "NO" and "Refuse" is often followed by an infinitive (to + VERB) for example "I refuse to answer that question. No! I will not do it!"
refuse - (татгалзах)  'reject' is much stronger of saying "NO-NO". and  Reject usually has a noun or noun phrase after it. 
deny - (худал хэлэх, үл хүлээн зөвшөөрөх) The main meaning of 'deny' is to say that something is not true. and The opposite of 'deny' would be 'admit'. 'Deny' also has a less common use, which is quite similar to 'refuse'

What's the difference between Refuse and Reject?

• They are synonyms and can often be used in the same sentence. Both mean you do not receive or accept something (a physical thing or an idea, suggestion, etc.).
  "I refused / rejected his job offer."
  Difference in Grammar:
  "Refuse" is often followed by an infinitive (to + VERB). Reject usually has a noun or noun phrase after it. 
  
  There is a slight differences in meaning, but it's rather subtle.
  
  Refuse is a bit harsher / stronger. The person is insistent on not accepting something. 
  
  "I refuse to answer that question. No! I will not do it!"
  
  Reject can be used to not accept something that is broken, not working properly, not in good shape/order.
  
  "The company will reject any application that doesn't have a cover letter attached."

• 'refuse' has a sense of saying "NO" while 'reject' is much stronger of saying "NO-NO" 

• Refuse is when someone offers you something.
  Reject is this or when you disagree with an idea (e.g. ideology, dissent).

• 'Reject' and 'refuse' are not so easily separated, even though the phrase 'reject and refute' repeatedly occurs in religious and quasi-legal Englishes. They are often used interchangeably, and I have an idea that choice in use is often idiomatic. 
  
  Some common collocations: 
  
  Refuse admission/a second helping 
  Refuse/reject an offer 
  Refuse/reject a gift. 
  Reject an excuse/an application/a suitor 
  
  It occurs to me that 'refuse' means 'not to admit', while the stronger 'reject'

Difference between refuse and deny?

• A useful way of seeing the difference is to look at the opposite of both words. 
  The opposite of Refuse is Accept and the opposite of Deny is Admit. 
  
  The main meaning of 'deny' is to say that something is not true. If the police are questioning somebody, the suspect might deny that he committed a crime, for example. 
  'Deny' also has a less common use, which is quite similar to 'refuse' - if you deny somebody something, you 'refuse' to give it to them - for example: 
  
  "The guards denied their prisoners food and water" 
  
  Finally, if you 'deny' someone, you say that they aren't connected to you at all - but this use is rather old-fashioned. 
  
  To 'refuse' is the opposite of to 'accept' - if you refuse to do something you choose not to do it, or say firmly that you will not do it. 
  
  You could also refuse something, which means that you don't accept it. For example: 
  
  "I offered him a cold drink but he refused it" 
  
  So to summarise, you would deny an allegation but refuse an offer

• Deny: to say that something someone has said about you isn't true and the opposite is " admit".
  
  Refuse: to say firmly that you are not willing to accept or do something and the opposite is " accept".

difference between reject, refuse, and deny

This is a very common question as 'deny', 'refuse', 'reject' and 'decline' often translate to the same word in other languages, so learners often have problems distinguishing between them.

One useful way of seeing the difference between words is to look at the opposite of each one...

'Accept' could be the opposite of 'refuse', 'reject', so we can see that these words have very similar meanings.

The opposite of 'deny' would be 'admit', however, so this is different to the others - an 'odd one out'.

The main meaning of 'deny' is to say that something is not true. If the police are questioning somebody, the suspect might deny that he committed a crime, for example.

'Deny' also has a less common use, which is quite similar to 'refuse' - if you deny somebody something, you 'refuse' to give it to them - for example:

"The guards denied their prisoners food and water"

Finally, if you 'deny' someone, you say that they aren't connected to you at all - but this use is rather old-fashioned.

To 'refuse' is the opposite of to 'accept' - if you refuse to do something you choose not to do it, or say firmly that you will not do it.

You could also refuse something, which means that you don't accept it. For example:

"I offered him a cold drink but he refused it"

Notice that the pronunciation has the stress on the second syllable - refuse as opposed to refuse, which is a formal word for rubbish.

'Reject' is quite similar to 'refuse' - the opposite of both would be 'accept'.

If you reject a proposal or a request, for instance, you decide not to agree with it...

"Judge Dread rejected the lawyer's request for more time to study the case"

If you reject a belief or a theory, you decide that you do not believe in it and you do not wish to follow it...

"The rebels rejected the authority of the central government."

'Reject' often carries the added meaning that you don't think something is good enough - if an employer rejects a job applicant, or a machine rejects a credit card it is because something is considered unsuitable, invalid or wrong in some way.

If someone rejects a lover, their family or friends, they behave with cruelty or indifference towards them and perhaps do not want to see them any more.

Notice that in all cases, the pronunciation is reject, reject, with the stress on the second syllable, which is common for verbs with two syllables.