Fire alarm : স্বয়ংক্রিয় অগ্নি সংকেত ব্যবস্থা;
Related Words
fire alarm  fire-alarm  See Words Also In
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Appropriate Prepositions
Abhorrence of (ঘৃণা): Everyone should have abhorrence of a par.
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Appear at/in(উপস্থিত হওয়া): I should appear at/in the exam hall in time.
Noted for (বিখ্যাত): She is noted for dancing.
Rely on (নির্ভর করা): We should not rely on a lazy man.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Back and bally (জীবিকা, ভরণ পোষণ—n) Who will provide the increasing population with the required back and bally?
Bad names (গালমন্দ—n) He called the man bad names.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.