कोई नहीं (koii nahiin)

pronoun/phrase A fixed two-word phrase built from कोई (koii, 'someone/any') plus नहीं (nahiin, 'not'), used to mean 'no one' or, in a common conversational aside, 'it's nothing / never mind.'
Sense 1 : no one, nobody
pronoun Functions as the negative counterpart of कोई (koii, 'someone') when answering or making statements about people; takes the same oblique/case behavior as कोई.
Frequency: high
Cultural Note: You will hear this constantly in answer to घर में कौन है? (ghar men kaun hai, 'who's home?') -- the reply कोई नहीं (koii nahiin) simply means 'nobody.' It pairs naturally with कुछ नहीं (kuchh nahiin, 'nothing') as the other half of Hindi's basic negative-pronoun set.
Common Mistakes: 1) Learners sometimes double-negate by adding another नहीं (nahiin) later in the sentence out of habit from English 'no one doesn't...'; in Hindi the negation is already complete in कोई नहीं (koii nahiin) itself. 2) Word order surprises: कोई नहीं आया (koii nahiin aayaa, 'no one came') keeps कोई नहीं together right before the verb, rather than splitting it apart.
Sample Sentences:
घर में कोई नहीं है। There's no one home.
(ghar men koii nahiin hai।)
Register: Casual -- Mood: Indicative -- Tense: Present -- Voice: Active
कल पार्टी में कोई नहीं आया। No one came to the party yesterday.
(kal paartii men koii nahiin aayaa।)
Register: Neutral -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
इस दफ्तर में कोई नहीं जानता कि मालिक कब आएगा। No one in this office knows when the boss will come.
(is daphtar men koii nahiin jaantaa ki maalik kab aaegaa।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
कोई नहीं समझ पाएगा कि तुमने ऐसा क्यों किया। No one will be able to understand why you did that.
(koii nahiin samajh paaegaa ki tumne aisaa kyon kiyaa।)
Register: Neutral -- Mood: Indicative -- Tense: Future -- Voice: Active
अगर वक़्त पर मदद न मिलती, तो कोई नहीं बच पाता। If help hadn't arrived on time, no one would have survived.
(agar vaqt par madad n miltii, to koii nahiin bach paataa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
यह राज़ ऐसा है कि इसके बारे में कोई नहीं जान सके। This secret is such that no one should be able to know about it.
(yah raaz aisaa hai ki iske baare men koii nahiin jaan sake।)
Register: Neutral -- Mood: Subjunctive -- Voice: Active
यहाँ कोई नहीं आए, चाहे कुछ भी हो जाए। Let no one come here, whatever happens.
(yahaan koii nahiin aae, chaahe kuchh bhii ho jaae।)
Register: Literary -- Mood: Subjunctive -- Voice: Active
देर रात को गलियों में कोई नहीं दिखता। No one is seen in the lanes late at night.
(der raat ko galiyon men koii nahiin dikhtaa।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Passive
उस हादसे के बाद यहाँ कोई नहीं रुका। After that accident, no one stopped here.
(us haadse ke baad yahaan koii nahiin rukaa।)
Register: Neutral -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
अरे, घर में कौन है? -- कोई नहीं। Hey, who's home? -- No one.
(are, ghar men kaun hai? -- koii nahiin।)
Register: Casual -- Mood: Indicative -- Tense: Present -- Voice: Active
मंत्री महोदय के आगमन पर स्टेशन पर कोई नहीं पहुँचा। No one arrived at the station for the minister's visit.
(mantrii mahoday ke aagman par steshan par koii nahiin pahunchaa।)
Register: Formal -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
Sense 2 : it's nothing, never mind, don't worry about it
phrase Used as a stand-alone conversational response, often shortened from the fuller कोई बात नहीं (koii baat nahiin), to wave off an apology or thanks.
Synonyms: कोई बात नहीं (koii baat nahiin), कुछ नहीं (kuchh nahiin)
Frequency: high
Cultural Note: Said with a casual wave of the hand, कोई नहीं (koii nahiin) is the everyday Delhi shortcut for 'forget it, it's fine' -- you will hear it constantly after someone bumps into you or apologizes for being late.
Common Mistakes: 1) Learners often reach for सॉरी इट्स फाइन-style literal translations; कोई नहीं (koii nahiin) here is idiomatic and should be learned as a fixed response, not built up word by word. 2) Confusing this reassuring sense with the 'no one' sense: context (a reply to sorry/thanks vs. a reply to 'who') is what tells them apart.
Sample Sentences:
अरे कोई नहीं, गलती हो जाती है। Oh it's nothing, mistakes happen.
(are koii nahiin, galtii ho jaatii hai।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
देर हो गई? कोई नहीं, बैठो। You're late? No problem, sit down.
(der ho gaii? koii nahiin, baitho।)
Register: Casual -- Mood: Imperative -- Aspect: Perfective -- Tense: Past -- Voice: Active
उसने माफी माँगी तो मैंने कहा, कोई नहीं। When he apologized, I said, it's nothing.
(usne maaphii maangii to mainne kahaa, koii nahiin।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
टकरा गए तो क्या, कोई नहीं यार। So what if we bumped into each other, no worries, man.
(takraa gae to kyaa, koii nahiin yaar।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
कोई नहीं, अगली बार सही समय पर आ जाना। It's fine, just come on time next time.
(koii nahiin, aglii baar sahii samay par aa jaanaa।)
Register: Casual -- Mood: Imperative -- Tense: Future -- Voice: Active
यह काम नहीं हो पाया, पर कोई नहीं, फिर कोशिश करेंगे। This didn't work out, but never mind, we'll try again.
(yah kaam nahiin ho paayaa, par koii nahiin, phir koshish karenge।)
Register: Casual -- Mood: Indicative -- Tense: Future -- Voice: Active
अगर सामान टूट भी जाए तो कोई नहीं, नया आ जाएगा। Even if the thing breaks, it's fine, a new one will come.
(agar saamaan toot bhii jaae to koii nahiin, nayaa aa jaaegaa।)
Register: Casual -- Mood: Subjunctive -- Voice: Active
अगर वह न आता तो भी कोई नहीं होता, हम शुरू कर देते। Even if he hadn't come, it wouldn't have mattered, we would have started anyway.
(agar vah n aataa to bhii koii nahiin hotaa, ham shuroo kar dete।)
Register: Casual -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
मैडम बुरा मत मानिए, कोई नहीं, ऐसा होता रहता है। Ma'am, please don't feel bad, it's nothing, this keeps happening.
(maidam buraa mat maanie, koii nahiin, aisaa hotaa rahtaa hai।)
Register: Formal -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
पैसे कम पड़ रहे हैं क्या? कोई नहीं, मैं दे देता हूँ। Are you short on money? No problem, I'll pay.
(paise kam pad rahe hain kyaa? koii nahiin, main de detaa hoon।)
Register: Casual -- Mood: Indicative -- Aspect: Continuous -- Tense: Present -- Voice: Active