Painless : যন্ত্রণাহীন;
Related Words
painless  panels  penniless  See Words Also In
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Appropriate Prepositions
Acceptable to(গ্রহণযোগ্য): Such behavior is just not acceptable in this school.
Apology to (কারো কাছে ক্ষমা চাওয়া): Rakib should ask apology to her.
Devoted to (মনোযোগী): He is devoted to music.
Hope for (আশা করা): Let us hope for the best.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
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Idioms
At a snail's pace (very slowly – খুব ধীর গতিতে) The economy of Bangladesh is growing at a snail’s pace.
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Slow coach (অলস): You cannot expect much from a slow coach.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.