rove v.

early 14c., raven, "to show signs of madness or delirium, to rage in speech," from Old French raver, variant of resver "to dream; wander here and there, prowl; behave madly, be crazy," a word of unknown origin (compare reverie). An identical (in form) verb meaning "to wander, stray, rove" dates from late 14c. in Scottish and northern dialect, and is probably from a Scandinavian word (such as Old Norse rafa). Sense of "talk about (something or someone) enthusiastically or immoderately" is recorded by 1704. Related: Raved; raving.

"sea-robber, pirate," late 14c. (c. 1300 as a surname), from Middle Dutch rover "robber, predator, plunderer," especially in zeerovere "pirate," literally "sea-robber," from roven "to rob," from Middle Dutch roof "spoil, plunder," related to Old English reaf "spoil, plunder," reafian "to reave" (see reave (v.), and compare reaver).

"one who wanders or rambles," especially to a great distance, 1610s, agent noun from rove (v.). Meaning "remote-controlled surface vehicle for extraterrestrial exploration" is from 1970.