Hand to mouth : নিতান্ত অপরিহার্য খাদ্য;
Related Words
hand and foot  hand note  hand to hand  hand to mouth  handtohand  handtomouth  See Words Also In
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Appropriate Prepositions
Appear at/in(উপস্থিত হওয়া): I should appear at/in the exam hall in time.
Close to(নিকটে): Our College is close to the Post Office.
Heir to (উত্তরাধিকার পাওয়া): He is an heir to a vast property.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.