At source : অর্থলাভ ইত্যাদির উৎসমূলে;
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Appropriate to(যোগ্য): His answer is appropriate to the question.
Ashamed of(লজ্জিত): Nandini was ashamed of his wrong-doing.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
In no time (শীঘ্র): He will finish the work in no time.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.