Early in its history, Batanes already had a civilization flourishing on its islands and was ruled by powerful chiefs who exacted revenues, administered justice, as well as exercised military might especially during times of invasion from other tribes.
The ROOT-WORD is the Prefix PARA which means BESIDE, ALONGSIDE & POSTION. There are other words with this root which it would be well for you to know, words such as PARAnoia, delusions of greatness; PARAphernalia, goods; PARAmount, etc.
The prefix hydro means water, aquatic, aqua, etc...