Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Caution against(সাবধান): Take all cautions against the danger.
Convinced of (আশ্বস্ত): You are convinced of his product.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
ABC - (প্রাথমিক জ্ঞান): I don't know the ABC of politics.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.