Perennial(adjective)
Lasting or existing for a long or apparently infinite time; enduring or continually recurring.
Hindi meaning:चिरस्थायी
Synonyms: Everlasting, Perpetual, Eternal, Continuing
Antonyms: Annual, Interrupted, Ceasing
Example: It was the perennial tug-of-war between engagement and withdrawal.
Trick to remember: Perennial rivers ka hona essential hai India me 
