उपयोगी (upyogii)

adjective A single-sense adjective meaning 'useful' or 'helpful,' commonly applied to objects, information, tools, and skills rather than to people's character.
Sense 1 : useful, helpful (for objects, information, skills)
adjective
Synonyms: काम का (kaam kaa, everyday phrase), लाभदायक (laabhdaayak, slightly formal), फ़ायदेमंद (faaydemand)
Frequency: high
Cultural Note: This is a very bookish-sounding but everyday word -- you'll see it constantly on product packaging, in textbooks, and in official notices (उपयोगी सूचना upyogii soochnaa, 'useful information'), so it has a slightly formal, written flavor even though everyone understands and uses it in speech. In casual chat, especially about a gadget or a tip someone gave you, many Delhi speakers reach first for the more colloquial काम का (kaam kaa, 'of use') -- ये चीज़ बहुत काम की है (ye chiiz bahut kaam kii hai, 'this thing is very useful') -- and save उपयोगी (upyogii) for slightly more formal or written contexts.
Common Mistakes: 1) उपयोगी (upyogii) describes things, information, or skills as useful -- it is not the natural word to praise a helpful *person*'s character; for a person who is kind and helpful, सहायक (sahaayak) or मददगार (madadgaar) fits better even though dictionaries list उपयोगी (upyogii) as a general synonym for 'useful.' 2) Learners sometimes try to inflect it like a regular -आ adjective; it is invariant and keeps the same form for masculine, feminine, and plural nouns alike.
Sample Sentences:
यह किताब परीक्षा की तैयारी के लिए बहुत उपयोगी है। This book is very useful for exam preparation.
(yah kitaab pariikshaa kii taiyaarii ke lie bahut upyogii hai।)
Register: Neutral -- Mood: Indicative -- Tense: Present -- Voice: Active
यह जानकारी नए कर्मचारियों के लिए उपयोगी सिद्ध होगी। This information will prove useful for new employees.
(yah jaankaarii nae karmchaariyon ke lie upyogii siddh hogii।)
Register: Formal -- Mood: Indicative -- Tense: Future -- Voice: Active
यात्रियों के लिए उपयोगी सूचना नीचे दी गई है। Useful information for passengers is given below.
(yaatriyon ke lie upyogii soochnaa niiche dii gaii hai।)
Register: Formal -- Mood: Indicative -- Aspect: Perfective -- Tense: Present -- Voice: Passive
क्या आपको यह ऐप अपने काम के लिए उपयोगी लगता है? Do you find this app useful for your work?
(kyaa aapko yah aip apne kaam ke lie upyogii lagtaa hai?)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
काश यह सुझाव मेरे लिए भी उतना ही उपयोगी होता। If only this suggestion had been just as useful for me too.
(kaash yah sujhaav mere lie bhii utnaa hii upyogii hotaa।)
Register: Neutral -- Mood: Counterfactual -- Aspect: Habitual -- Voice: Active
सरकार को नागरिकों के लिए और अधिक उपयोगी योजनाएँ बनानी चाहिए। The government should create more useful schemes for citizens.
(sarkaar ko naagrikon ke lie aur adhik upyogii yojnaaen banaanii chaahie।)
Register: Formal -- Mood: Subjunctive -- Tense: Present -- Voice: Active
उन उपकरणों का चुनाव करें जो आपके शोध के लिए वास्तव में उपयोगी हों। Choose those tools that are truly useful for your research.
(un upkarnon kaa chunaav karen jo aapke shodh ke lie vaastav men upyogii hon।)
Register: Formal -- Mood: Imperative -- Voice: Active
इस मशीन के हर पुर्जे का अलग-अलग उपयोगी कार्य होता है। Every part of this machine has its own separate useful function.
(is mashiin ke har purje kaa alag-alag upyogii kaary hotaa hai।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
प्राचीन ग्रंथों में आज भी जीवन के लिए उपयोगी शिक्षाएँ मिलती हैं। Even today, useful teachings for life are found in ancient texts.
(praachiin granthon men aaj bhii jiivan ke lie upyogii shikshaaen miltii hain।)
Register: Literary -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Active
पहले तो यह औज़ार बेकार लग रहा था, पर बाद में बहुत उपयोगी निकला। At first this tool seemed useless, but later it turned out to be very useful.
(pahle to yah auzaar bekaar lag rahaa thaa, par baad men bahut upyogii niklaa।)
Register: Casual -- Mood: Indicative -- Aspect: Perfective -- Tense: Past -- Voice: Active
इस पत्रिका में हर महीने कुछ उपयोगी टिप्स प्रकाशित की जाती हैं। Some useful tips are published in this magazine every month.
(is patrikaa men har mahiine kuchh upyogii tips prakaashit kii jaatii hain।)
Register: Neutral -- Mood: Indicative -- Aspect: Habitual -- Tense: Present -- Voice: Passive
Morphology
Adjective (invariant)
invariant: उपयोगी (upyogii)