Causticity : দাহকতা; ক্ষয়কারিতা;
Related Words
caducity  castigate  caustic soda  causticity  See Words Also In
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Appropriate Prepositions
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Easy of (সরল): The teacher is easy of approach.
Entitled to (অধিকারী): He is entitled to a reward for honesty.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
Hunger for (আকাঙ্কা): The teacher has a great hunger for knowledge.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.