মূলতত্ত্ব: [Noun] First principle.
Related Words
মহাসত্ত্ব  মূলতত্ত্ব  মূলমন্ত্র  মোহমন্ত্র  See Words Also In
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Appropriate Prepositions
Adjacent to(সংলগ্ন): The Post Office is adjacent to my house.
Count on/upon (নির্ভর, বিশ্বাস করা): Rahim count on (upon) my help.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.