Stop-cock : তরল পদার্থের বা গ্যাসের কলের মুখ;
Related Words
stop cock  stop-cock  stopcock  See Words Also In
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Appropriate Prepositions
Add to (বৃদ্ধি করা, যোগ করা): The doll-dance in the exhibition added to our pleasure.
Argue against (বিপক্ষে বলা): She argued against the bill.
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Good for, at (ভাল): This man is good for nothing. He is good at English.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
On the whole (মোটের ওপর): On the whole, his conduct is good.
Pros and cons (খুঁটিনাটি): You should consider the pros and cons of the system.