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
Admit into(প্রবেশ করতে দেওয়া): Only the selected people were admitted into the theater.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
At a low ebb (in an unfavorable situation প্রতিকুল অবস্থায়, ভাটির মুখে) The popularity of this singer is now at a low ebb.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Set something right (ঠিক করা)— He will set the machine right.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.