Optimists : আশাবাদী; আশাবাদী ব্যক্তি; আশাবাদী দার্শনিক; মঙ্গলবাদী;
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optimistic  optimistically  optimists  See Words Also In
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Appropriate Prepositions
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Care for(গ্রাহ্য করা): I do not care for you.
Careful of (সতর্ক): He is very careful of his fault.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Shocked at (মানসিক আঘাতপ্রাপ্ত): Snigdha was terribly shocked at the death of Ratul.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
In the long run (পরিণামে): You will have to suffer in the long run.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.