proper noun/bu.ɡɛ̃.vil/
a French surname, Bougainville; Bougainville (an island of Papua New Guinea; in full, Bougainville Island); Bougainville (an autonomous region of Papua New Guinea; in full, Autonomous Region of Bougainville); Bougainville (a commune of Somme department, Hauts-de-France, France)