Mainspring : মুখ্য উদ্দেশ্য; ঘড়ির প্রধান চালক-স্প্রিং;
Related Words
mainspring  misfiring  See Words Also In
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Appropriate Prepositions
Attest to(প্রত্যয়ন করা): I like to attest to your ability.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Hanker after (আকাঙ্ক্ষা/লোভ করা): He hankers after riches.
Repent on (নির্ভরশীল): He is repent on his parents.
Take after (সদৃশ হওয়া, একই রকম হওয়া): The boy takes after his brother.
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Idioms
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.