Unflappable : উদ্বেগহীন; অচঞ্চল; সংকটে অবিচলিত; অনুদ্বিগ্ন;
Related Words
unappealable  unavailable  unbelievable  unflappable  See Words Also In
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Appropriate Prepositions
Agree with(ব্যক্তির সাথে একমত হওয়া): I agree with you.
Ashamed of(লজ্জিত): Nandini was ashamed of his wrong-doing.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Convinced of (আশ্বস্ত): You are convinced of his product.
Defend against (রক্ষা করা): We will defend our country against all enemies.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Cock and bull story (আষাঢ়ে গল্প): You must be ashamed of your cock and bull story.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
Without fail (অবশ্যই) - You must attend the meeting without fail.
Worthy of (যোগ্য) - He is worthy of a good job.