Unthankful : অকৃতজ্ঞ;
Related Words
unthankful  unthankfulness  unthinkable  See Words Also In
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Appropriate Prepositions
Acceptable to(গ্রহণযোগ্য): Such behavior is just not acceptable in this school.
Cause of(কারণ): Industry is the cause of your success.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
Hope for (আশা করা): Let us hope for the best.
Run on (বিরতিহীন চলা): The bus is running on time.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Call to mind (স্মরণ করা): I cannot call to mind your cell number.
Fish out of water (অস্বস্তিকর অবস্থা): When he came to the village, he felt like fish out of water.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.