triad
🇺🇸
/ˈtraɪæd/
🇬🇧
/ˈtraɪæd/
a set of three related things or people
The triad of colors in the painting were red, blue, and yellow.
画作中的三原色是红色、蓝色和黄色。
a secret Chinese organization involved in crime
The police were investigating the activities of a local triad.
警方正在调查一个本地三合会的活动。