Similar words: gorilla, drill, peril, thrill, shrill, verily, thrilled, perilous. Meaning: n. a member of an irregular armed force that fights a stronger force by sabotage and harassment.
(31) We then joined up with the guerilla partisans that were trapped back there and inflicted massive destruction upon the Hitlerite rear units.
(32) By 1959, after two years of guerilla insurgency, a coup was achieved.