Well-head : আদি উৎস;
Related Words
well oiled  well-head  well-to-do  welladay  welled  wellhead  welloiled  willed  See Words Also In
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Appropriate Prepositions
Appropriate to(যোগ্য): His answer is appropriate to the question.
Change into (পরিবর্তিত হওয়া): At what point does boiling water change into vapor.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Noted for (বিখ্যাত): She is noted for dancing.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
At a discount (অনাদৃত) Female education is no longer at a discount now.
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
End in smoke (ব্যর্থ হওয়া): All his plans ended in smoke.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.