Indefatigably : অশ্রান্তভাবে;
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indefatigable  indefatigably  See Words Also In
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Appropriate Prepositions
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Careful of (সতর্ক): He is very careful of his fault.
Dependent on (নির্ভরশীল): Sepm is dependent on his father.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
Indulge in (আসক্ত): You should not indulge in social media.
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Idioms
Fair and square (সৎ): The learned persons should be fair and square.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Run short (কমতি পড়া) —I ran short of money.
Set something right (ঠিক করা)— He will set the machine right.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.