A white elephant : অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা;
Related Words
a white elephant  awhiteelephant  See Words Also In
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Appropriate Prepositions
Count upon(নির্ভর করা): He always counts upon your help for this work.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Fed up with (বিরক্ত): He is fed up with waiting for her.
Hope for (আশা করা): Let us hope for the best.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
A bed of roses - (সুখকর অবস্থা): Life is not a bed of roses.
Pass away (মারা যাওয়া)— He passed away last night.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.