Visual aid : শিক্ষণ-সহায়ক চাক্ষুষ উপকরণ; দৃক-উপকরণ;
Related Words
visual aid  visuality  See Words Also In
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Appropriate Prepositions
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Detrimental to (অপকারী): Smoking is detrimental to health.
Indulge in (আসক্ত): You should not indulge in social media.
Taste for (রুচি; পছন্দ): He has a great taste for music.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Take one to task (rebuke, তিরস্কার করা)— He took me to task for negligence of duty.