As firm as a rock : অটল; অচল; অনড়;
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Appropriate Prepositions
Adjacent to (সন্নিহিত): His house was adjacent to the bridge.
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Compete with(প্রতিযোগিতা করা): He does not pke to compete with
Quarrel with (ঝগড়া করা): Some girls quarreled with one another.
Run on (বিরতিহীন চলা): The bus is running on time.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Pin money (স্ত্রীর দেয়া হাত খরচ)— She saved her pin money.
Short temper (রগচটা)— He is a man of short temper.