orienteering

n [U] sport of finding one's way across country on foot using a map and compass 越野识途比赛（靠地图和罗盘徒步寻找目的地）: He has taken up orienteering. 他参加过越野识途赛.

organise, organism, organist, organization, organization, organisation, organizational, organizational, organisational, organize, organize, organise, organized, organised, organizer, organiser, orgasm, orgiastic, orgy, oriel, orient, oriental, orientalist, orientate, orientation, orifice, origin, original, original sin, originality, originally, originate, originator, oriole, ormolu, ornament, ornamental, ornamentation, ornate, ornately, ornateness, ornithological, ornithologist, ornithology, orotund,