Noun:

মহাশক্তিশালী প্রতিপক্ষকে কাবু করে যে ব্যক্তি, মহারথী বিজেতা, যে ব্যক্তি ইন্দ্রপতন ঘটায,

giant killer's Usage Examples:

UR's basketball program has developed a reputation as a "giant killer" in the NCAA tournament[citation needed], defeating the Charles Barkley-led.

Giant-killing or giant killer may refer to: Upset (competition), in a contest, especially in sport, when an underdog beats the strong favourite Killing.

Synonyms:

soul; poisoner; someone; suicide; mortal; public executioner; manslayer; somebody; garroter; person; liquidator; murderer; exterminator; strangler; throttler; individual; felo-de-se; slayer; eradicator; executioner; garrotter; choker; terminator; regicide;

Antonyms:

adult; female; loser; juvenile; bad person;