Annexation(noun)
Meaning: possession taken of a piece of land or a country, usually by force or without permission.
Hindi meaning:राज्य-हरण; संयोजन
Synonyms: Seizure, Appropriation, Takeover, Occupation
Antonyms: Surrender, Renunciation, Return, Restoration
Example: Annexations helped San Jose grow into one of the nation's biggest cities.
Trick to remember: axe or sword ke dum par possession = annexation 
