Unfalteringly : অবিচলিতচিত্তে; দ্বিধাহীনভাবে; নির্দ্বিধরূপে;
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Appropriate Prepositions
Adjacent to (সন্নিহিত): His house was adjacent to the bridge.
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Infested with (অতিষ্ঠ): The room is infested with rats.
Run over (চাপা পড়া): The man was run over by a truck.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.