English
freebooter
From free + booty + -er.
Formed from free + booty + -er
Proto-Indo-European *preyH- ‘to please; to love’
…
Proto-Germanic *frijaz ‘free’
Proto-West Germanic *frī ‘free’
Old English frēo ‘free, at liberty’
Middle English fre ‘having the status of a freeman’
English free
Middle Low German bǖte ‘distribution, exchange, loot’
Old French butin ‘spoils, plunder, booty’
Middle English buty
English booty
Today it means
noun An adventurer who pillages, plunders, or thieves privately or for compensation; or wages ad-hoc war on other nations, similar to mercenary; also a "freeboot".
Language periods are conventional ranges, not dates for this word.
Etymograph / freebooter