Air-gap : বায়ুচ্ছেদ;
Related Words
air-gap  air-space  See Words Also In
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Appropriate Prepositions
Absorbed in(মগ্ন): I am absorbed in my study.
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Similar to (সদৃশ): My T-shirt is similar to yours.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.
Take into account (বিবেচনা করা): Your activities should be taken into account.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Well off (স্বচ্ছল) - Jim and Della were not well off.