Pitch in : কোমর বেঁধে লাগা;
Related Words
patching  pitch in  pitch into  pitching  puts in  See Words Also In
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Appropriate Prepositions
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Caution against(সাবধান): Take all cautions against the danger.
Hunger for (আকাঙ্কা): The teacher has a great hunger for knowledge.
Rely on (নির্ভর করা): We should not rely on a lazy man.
Shocked at (মানসিক আঘাতপ্রাপ্ত): Snigdha was terribly shocked at the death of Ratul.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.