Unthankful : অকৃতজ্ঞ;
Related Words
unthankful  unthankfulness  unthinkable  See Words Also In
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Appropriate Prepositions
Abide with(সঙ্গে থাকা): If you would like to rest for a while, you can abide with me.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Fed up with (বিরক্ত): He is fed up with waiting for her.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
Meet with (হঠাৎ কোন কিছু হওয়া): Yesterday I met with an accident.
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Idioms
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.