ज़्यादातर (zyaadaatar)

adverb/adjective One core meaning: 'mostly / most of' -- used both as an adjective (quantifying a noun) and as an adverb (modifying the whole statement). The two uses share the same word and are split below by grammatical role.
Sense 1 : mostly, usually, most of the time
adverb
Synonyms: आम तौर पर (aam taur par), अक्सर (aksar, mostly about frequency rather than proportion), सामान्यतः (saamaanytah, formal)
Frequency: high
Cultural Note: You will hear this constantly in casual descriptions of habits: लोग ज़्यादातर (zyaadaatar) घर पर खाना खाते हैं is the kind of line a Delhi aunty might say about the neighborhood. It is a very natural, everyday word, nowhere near as formal as सामान्यतः (saamaanytah).
Common Mistakes: 1) Learners often confuse this with अक्सर (aksar): ज़्यादातर (zyaadaatar) points more to 'the majority of the time/cases,' while अक्सर (aksar) is closer to 'often, frequently' -- there is overlap but they are not perfect swaps. 2) As an adverb it sits before the verb phrase it modifies (often near the front of the sentence), not right before the noun it might seem to describe.
Sample Sentences:
मैं ज़्यादातर सुबह जल्दी उठता हूँ। I mostly wake up early in the morning.
(main zyaadaatar subah jaldii uthtaa hoon।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
लोग ज़्यादातर घर पर खाना खाते हैं। People mostly eat at home.
(log zyaadaatar ghar par khaanaa khaate hain।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
पिछले महीने वह ज़्यादातर बीमार ही रहा। Last month he was mostly sick.
(pichhle mahiine vah zyaadaatar biimaar hii rahaa।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Past -- Voice: Active
इस बार बारिश के मौसम में ज़्यादातर बादल ही छाए रहेंगे। This time during the rainy season, it'll mostly stay cloudy.
(is baar baarish ke mausam men zyaadaatar baadal hii chhaae rahenge।)
Register: Casual -- Mood: Indicative -- Tense: Future -- Voice: Active
दफ़्तर में मैं ज़्यादातर अपने कंप्यूटर पर काम कर रहा होता हूँ। At the office I'm usually working on my computer.
(daftar men main zyaadaatar apne kampyootar par kaam kar rahaa hotaa hoon।)
Register: Casual -- Mood: Indicative -- Aspect: Continuous -- Tense: Present -- Voice: Active
अगर तुम ज़्यादातर टाइम पर आया करते, तो बॉस नाराज़ नहीं होता। If you usually came on time, the boss wouldn't get annoyed.
(agar tum zyaadaatar taaim par aayaa karte, to bos naaraaz nahiin hotaa।)
Register: Casual -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
ज़्यादातर तो वह चाय ही पीती है, कॉफ़ी शायद ही कभी। Mostly she just drinks tea, coffee almost never.
(zyaadaatar to vah chaay hii piitii hai, kofii shaayad hii kabhii।)
Register: Casual -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
शादियों में खाना ज़्यादातर बुफ़े स्टाइल में परोसा जाता है। At weddings, food is mostly served buffet style.
(shaadiyon men khaanaa zyaadaatar bufe staail men parosaa jaataa hai।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Passive
ज़्यादातर वही करो जो तुम्हें सही लगे, बाकी की चिंता मत करो। Mostly just do what feels right to you, don't worry about the rest.
(zyaadaatar vahii karo jo tumhen sahii lage, baakii kii chintaa mat karo।)
Register: Casual -- Mood: Imperative -- Voice: Active
हो सकता है वे ज़्यादातर वीकेंड पर ही मिलते हों। It's possible they mostly meet only on weekends.
(ho saktaa hai ve zyaadaatar viikend par hii milte hon।)
Register: Casual -- Mood: Subjunctive -- Aspect: Habitual -- Tense: Present -- Voice: Active
इस इलाके में ज़्यादातर दुकानें रात नौ बजे तक बंद हो जाती हैं। In this area, shops mostly close by nine at night.
(is ilaake men zyaadaatar dukaanen raat nau baje tak band ho jaatii hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
Sense 2 : most (of), the majority of
adjective Functions like an invariant quantifier placed before the noun it quantifies, e.g. ज़्यादातर लोग (zyaadaatar log, 'most people') -- it does not change form for gender or number.
Synonyms: अधिकांश (adhikaansh, formal), बहुत सारे (bahut saare, covers 'a lot of' more than strictly 'majority')
Frequency: high
Cultural Note: This is the word you reach for constantly in daily chatter -- ज़्यादातर दुकानें बंद हैं (zyaadaatar dukaanen band hain, 'most shops are closed') is exactly the sort of line you would hear about a market on a holiday. Its formal cousin अधिकांश (adhikaansh) shows up more in news reports and writing.
Sample Sentences:
ज़्यादातर दुकानें बंद हैं। Most shops are closed.
(zyaadaatar dukaanen band hain।)
Register: Casual -- Mood: Indicative -- Tense: Present -- Voice: Active
ज़्यादातर लोगों ने यह फ़िल्म देखी है। Most people have seen this film.
(zyaadaatar logon ne yah film dekhii hai।)
Register: Neutral -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
क्लास के ज़्यादातर बच्चे परीक्षा में पास हो गए। Most of the children in the class passed the exam.
(klaas ke zyaadaatar bachche pariikshaa men paas ho gae।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
अगर ज़्यादातर सदस्य राज़ी हों, तो हम प्रस्ताव पास कर देंगे। If most of the members agree, we will pass the proposal.
(agar zyaadaatar sadasy raazii hon, to ham prastaav paas kar denge।)
Register: Formal -- Mood: Subjunctive -- Voice: Active
काश ज़्यादातर सामान बच जाता, पर बारिश में सब भीग गया। If only most of the belongings had been saved, but everything got soaked in the rain.
(kaash zyaadaatar saamaan bach jaataa, par baarish men sab bhiig gayaa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Perfective -- Voice: Active
अगले महीने तक ज़्यादातर काम पूरा हो जाएगा। Most of the work will be finished by next month.
(agle mahiine tak zyaadaatar kaam pooraa ho jaaegaa।)
Register: Formal -- Mood: Indicative -- Tense: Future -- Voice: Passive
इस शहर में ज़्यादातर सड़कें रात में सुनसान हो जाती हैं। Most of the streets in this city become deserted at night.
(is shahar men zyaadaatar sadken raat men sunsaan ho jaatii hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
देखो, ज़्यादातर सामान तो पैक हो चुका है, बस कुछ ही बचा है। Look, most of the stuff is already packed, only a little is left.
(dekho, zyaadaatar saamaan to paik ho chukaa hai, bas kuchh hii bachaa hai।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Present -- Voice: Passive
समिति के ज़्यादातर सदस्यों की राय एक जैसी थी। The opinion of most members of the committee was the same.
(samiti ke zyaadaatar sadasyon kii raay ek jaisii thii।)
Register: Formal -- Mood: Indicative -- Tense: Past -- Voice: Active
यार, ज़्यादातर टेस्ट में तो मैं ही सही निकला। Dude, I turned out to be right in most of the tests.
(yaar, zyaadaatar test men to main hii sahii niklaa।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
ज़्यादातर मेहमान अभी भी आ रहे हैं। Most of the guests are still arriving.
(zyaadaatar mehmaan abhii bhii aa rahe hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Continuous -- Tense: Present -- Voice: Active
Morphology
Adjective (invariant)
invariant: ज़्यादातर (zyaadaatar)