Keep at : লেগে থাকা; চালিয়ে যাওয়া; ছেড়ে না দেওয়া;
Related Words
keep at  keep out  keep up with  keepout  kept  See Words Also In
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Appropriate Prepositions
Cast aside (ছুঁড়ে ফেলা): As soon as they become rich they cast aside their poor friends.
Cope with(সামলানো বা পেরে উঠা): They cannot cope with the situation.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Rejoice at/in (আনন্দ করা): Everybody rejoiced at/in his success.
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Idioms
Fish out of water (অস্বস্তিকর অবস্থা): When he came to the village, he felt like fish out of water.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.