Unworried : নিশ্চিন্ত; অশঙ্কিত; অচঁচল; নিরূদ্বেগ; অব্যাকুল;
Related Words
un married  unhonoured  unhurried  unhurriedly  unhurriedness  unmarried  unmarried girl  unmerited  unmoored  unread  unready  unrewarded  unwearied  unworried  unworthiest  unwritten  See Words Also In
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Appropriate Prepositions
Adjacent to(সংলগ্ন): The Post Office is adjacent to my house.
Admit into(প্রবেশ করতে দেওয়া): Only the selected people were admitted into the theater.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Worry about (কোনো কিছু বা কাউকে নিয়ে উদ্বিগ্ন হওয়া): Please, don’t worry about me. I will be alright.
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Idioms
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.