In theory : ধারণায়;
Related Words
in another way  in other words  in ter com  in tern  in the air  in the red  in the round  in the world  in theory  in turn  initiatory  inter  intercessory  interim  intermarry  intern  internally  interne  interns  interplay  inters  interse  See Words Also In
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Appropriate Prepositions
Care of(যত্ন নেওয়া): You should take care of your health.
Conscious of(সচেতন): I am conscious of my deficiencies.
Cope with (এঁটে ওঠা; তাল মিলিয়ে চলা): They cannot cope with so much work.
Die from (কোন কিছু জন্য মারা যাওয়া): The poor person died from hunger.
Heir of (উত্তরাধিকারী): He is the heir of his father.
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Idioms
From cradle to grave (দোলনা থেকে কবর পর্যন্ত): Everyone has to learn from cradle to grave.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
In full swing (পুরোদমে): The school is in full swing after the vacation.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Worthy of (যোগ্য) - He is worthy of a good job.