On the sly : গোপনে; গোপনে; চোরাগোপ্তাভাবে;
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Appropriate Prepositions
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Bark at(ঘেউ ঘেউ করা): The dog is barking at the strange woman.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Look for (খোঁজা): I was looking for the lost phone.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
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Idioms
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
From cradle to grave (দোলনা থেকে কবর পর্যন্ত): Everyone has to learn from cradle to grave.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.