ADJ [usually ADJ n](争端、竞赛、比赛等)三角的，三人的，三方的 If you describe something such as a disagreement, competition, or game as three-cornered, you mean that it involves three people, groups, or teams. (争端、竞赛、比赛等)三角的，三人的，三方的 [mainly British]
...the three-cornered struggle between employers and male and female workers.