freebooter

[free-boo-ter] /ˈfriˌbu tər/
noun
1.
a person who goes about in search of plunder; pirate; buccaneer.
Origin
1560-70; Anglicization of Dutch vrijbuiter, equivalent to vrij free + buit booty + -er -er1
British Dictionary definitions for freebooter

freebooter

/ˈfriːˌbuːtə/
noun
1.
a person, such as a pirate, living from plunder
2.
(informal) a person, esp an itinerant, who seeks pleasure, wealth, etc, without responsibility
Word Origin
C16: from Dutch vrijbuiter, from vrijbuit booty; see filibuster
Word Origin and History for freebooter
n.

1560s, loan-translation of Dutch vrijbuiter "plunderer, robber," from vrijbuiten "to rob, plunder," from vrijbuit "plunder," literally "free booty," from vrij "free" + buit "booty," from buiten "to exchange or plunder," from Middle Dutch buten, related to Middle Low German bute "exchange" (see booty). Cf. filibuster. The back-formed verb freeboot is recorded from 1590s.