The meaning of the word ' Conundrum' is -

• Conundrum (noun)

English Meaning: A problem that is difficult to deal with.
Bangla Meaning: কঠিন প্রশ্ন; বাধা।

Synonyms: Problem (সমস্যা; জটিলপ্রশ্ন), Mystery (অস্পষ্টতা; রহস্যময়তা), Quandary (দ্বিধা; কিংকর্তব্যবিমূঢ়তা), Trouble (ঝামেলাপূর্ণ), Enigma (ধাঁধা/প্রহেলিকা)। 
Antonyms: Obviousness (সুস্পষ্টতা), Sure thing (সঠিক, নিশ্চিত বিষয়), Certainty (নিশ্চিন্ততা), Solution (সমাধান), Simplicity (সরলতা)। 

Other Forms:
- Conundrumical (Informal/ rare use)

Example Sentence: 
1. Arranging childcare over the school holidays can be a real conundrum for working parents.
2. The problem remains a conundrum to me, and I hope others can propose ways of dealing with it.

• অন্য অপশন গুলোর মধ্যে - 
• To make unpleasant feelings less strong - Assuage.
• To make something less or weaker - Attenuate.
• To say that something is certainly true - Aver.

Source: Website Lecture.