Strengthen : সরল করা;
Related Words
strengthen  strengthened  strengthening  strengthens  See Words Also In
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Bar to(বাধা): Poverty is not a bar to happiness.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Thirst for (তৃষ্ণা, আকাঙ্ক্ষা): A wise man has no thirst for wealth.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Out of order (বিকল): The elevator was out of order.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.