Perfidious : বিশ্বাসহীন; বিশ্বাসঘাতক; অবিশ্বাসী; অবিশ্বস্ত;
Related Words
perfidious  perfidiousness  propitious  See Words Also In
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Appropriate Prepositions
Absent from(অনুপস্থিত থাকা): I was absent from the class yesterday.
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Capable of(সক্ষম): He is capable of doing it.
Crave for(আকাঙ্ক্ষা করা): Everyone craves for care.
Look into (তদন্ত করা/অনুসন্ধান করা): I am looking into the matter.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
In full swing (পুরোদমে): The school is in full swing after the vacation.
In the long run (পরিণামে): You will have to suffer in the long run.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.