Helpful : সাহায্যকারী, উপকারী
Related Words
helpful  helpfulness  helpless  See Words Also In
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Appropriate Prepositions
Abound in(প্রাচুর্যপূর্ণ হওয়া): Fish abounds in the pond.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Hanker after (আকাঙ্ক্ষা/লোভ করা): He hankers after riches.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.