Thankless : অকৃতজ্ঞ; প্রশংসাহীন;
Related Words
tangles  thankless  thanklessness  tingles  tinkles  See Words Also In
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Appropriate Prepositions
Affectionate to(স্নেহশীল): He is very affectionate to his baby.
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Dead against (তীব্র বিরোধী - strongly opposed to): I am dead against corruption.
Far and wide (সর্বত্র): His fame spread far and wide.
For good (চিরদিনের জন্য): He left the house for good.
Of course (অবশ্যই): Of course, you know what that meant.