Ruthless : নিষ্ঠুর, নির্দয়;
Related Words
rattles  roadless  rootless  ruthless  See Words Also In
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Appropriate Prepositions
Competent for(যোগ্য): He is not competent for the post.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Die of (রোগে মরা): Many people died of cholera.
Regret for (দুঃখ করা): We regretted for his failure.
Repent on (নির্ভরশীল): He is repent on his parents.
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Idioms
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Call in question (সন্দেহ করা): No one can call his honesty in question.
For good (চিরদিনের জন্য): He left the house for good.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Of course (অবশ্যই): Of course, you know what that meant.