Prehistory : প্রাগৈতিহাসিক বিষয় বা যুগ;
Related Words
precatory  prehistoric  prehistory  projector  purgatory  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Ashamed of(লজ্জিত): Nandini was ashamed of his wrong-doing.
Aware of(অবগত): I am not aware of his dishonesty.
Faith in (বিশ্বাস): I have no faith in him.
Rejoice at/in (আনন্দ করা): Everybody rejoiced at/in his success.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.
Let loose (বল্গাহীনভাবে ছেড়ে দেয়া): He let his horse loose in the field.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.