C16: from Latin perambulāre to traverse, from per through + ambulāre to walk
Word Origin and History for perambulate
v.
1560s, from Latin perambulatus, past participle of perambulare "to walk through, go through, ramble through," from per- "through" (see per) + ambulare "to walk" (see amble). Related: Perambulated; perambulating.