नहीं
Braj
    
    Etymology
    
From Sanskrit नहि (nahí, “surely not”), from Proto-Indo-Iranian *naǰʰí, from earlier *ná gʲʰí, from Proto-Indo-European *né + *gʰí. Cognate with Assamese নাই (nai), Early Assamese নাহি (nahi), Hindi नहीं (nahī̃).
Alternative forms
    
- नाहीं (nāhī̃), नहिं (nahĩ), नाहिं (nāhĩ), नहीन (nahīn), नाहीन (nāhīn), नहिन (nahin), नाहिन (nāhin)
 
Hindi
    
    Etymology
    
Inherited from Sanskrit नहि (nahí, “surely not”), from Proto-Indo-Iranian *naǰʰí, from earlier *ná gʲʰí, from Proto-Indo-European *né + *gʰí. Cognate with Assamese নাই (nai), Early Assamese নাহি (nahi), Braj नहीं (nahī̃).
Pronunciation
    
- (Delhi Hindi) IPA(key): /nə.ɦĩː/, [nɐ.ɦĩː]
 Audio (file) 
Particle
    
नहीं • (nahī̃) (Urdu spelling نہیں)
Usage notes
    
Often used with the polite particle जी (jī) to be more polite in answering those given respect as in जी नहीं (jī nahī̃).
नहीं (nahī̃) is not used with verbs in subjunctive and imperative mood. The subjunctive negation ना (nā) is used with the subjunctive mood and the imperative negation मत (mat) is used with the imperative mood.
References
    
- McGregor, Ronald Stuart (1993) “नहीं”, in The Oxford Hindi-English Dictionary, London: Oxford University Press