Black stain : কালচিটে; কালচিটা;
Related Words
ballasting  black stain  blasting  block stone  blockading  See Words Also In
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Appropriate Prepositions
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Free from (মুক্ত): He is now free from danger.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Long for (আশা করা/কামনা করা): He longed for name and fame.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.