To obscure : অস্পষ্ট করা; অন্ধকার করা; ক্ষীণ করা; ম্লান করা; গোপন করা;
Related Words
to absorb  to be sure  to obscure  to observe  top secret  topsecret  See Words Also In
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Appropriate Prepositions
Abound with(ছেয়ে থাকা): They live in a region that abounds with oil.
Absorbed in(মগ্ন): I am absorbed in my study.
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Delegate to (প্রতিনিধি): Nazrul welcomed the delegates to the new conference.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
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Idioms
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.