Penetration : প্রবেশ, অন্তর্নিবেশ;
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penetrating  penetration  penetrations  See Words Also In
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Capable of(সক্ষম): He is capable of doing it.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Dead against (তীব্র বিরোধী - strongly opposed to): I am dead against corruption.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.