Voluntary : স্বতঃপ্রবৃত্ত; স্বেচ্ছাকৃত; ঐচ্ছিক; বিনা পারিশ্রমিকে কৃত এমন;
Related Words
volu nteer  volumetric  voluntarily  voluntarism  voluntary  volunteer  volunteered  volunteering  volunteers  See Words Also In
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Appropriate Prepositions
Adequate to(সমানুপাতিক): The salary, he gets, is not adequate to the volume of work he has to do.
Care of(যত্ন নেওয়া): You should take care of your health.
Devoted to (মনোযোগী): He is devoted to music.
Lost in (মগ্ন): Simon is lost in meditation.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
Of course (অবশ্যই): Of course, you know what that meant.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.