Touch wood : অদৃষ্টের দয়া পাত্ত!;
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Deal with (কারো সাথে ব্যবহার বা আচরণ করা): Shahid can deal well with the customers.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Inquire for (দেখা করতে চাওয়া): He inquires for the manager.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
At the top of (শীর্ষে): The boy shouted at the top of his voice.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.