Unhygienic : অস্বাস্থ্যকর, স্বাস্থ্যবিধি বিরোধী;
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Appropriate Prepositions
Absorbed in(মগ্ন): I am absorbed in my study.
Creep up (বৃদ্ধি পাওয়া): The prices of are creeping up day by day.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Indifferent to (উদাসীন): Everybody is indifferent to my problem.
Look at (তাকানো): Students look at the blackboard.
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Idioms
All up with - (পুরোপুরি, হতাশ, সব আশা শেষ): If we can't, it's all up with the councillor.
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Learn by heart (মুখস্থ করা)— He learnt the poem by heart.