On duty : দৈনন্দিন কর্তব্যত অবস্থায়;
Related Words
on dit  on duty  on end  on to  onduty  one day  oneday  See Words Also In
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Appropriate Prepositions
Zeal for (উৎসাহ): Forhad has great zeal for cricket.
Catch at(ধরা): A drowning man catches at a straw.
Consist of(গঠিত হওয়া): The committee consists of ten members.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Search for (সন্ধান করা): The police searched the halls of residence for arms.
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Idioms
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.