Thankless : অকৃতজ্ঞ; প্রশংসাহীন;
Related Words
tangles  thankless  thanklessness  tingles  tinkles  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Argue with, about(কথা কাটাকাটি করা): They always argue with me about tiny matter.
Aware of(অবগত): I am not aware of his dishonesty.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Call to mind (স্মরণ করা): I cannot call to mind your cell number.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
Take one to task (rebuke, তিরস্কার করা)— He took me to task for negligence of duty.