triad
🇺🇸
/ˈtraɪæd/
🇬🇧
/ˈtraɪæd/
a set of three related things or people
The triad of colors in the painting were red, blue, and yellow.
絵画の三原色は赤、青、黄色です。
a secret Chinese organization involved in crime
The police were investigating the activities of a local triad.
警察は地元の三合会の活動を捜査していました。