![Membean Word Root Of the Day show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/025/719/small/membean-word-root-of-the-day.jpg)
Summary: The English prefix *tri-*, derived from both Greek and Latin, means "three." Some common English vocabulary words that contain this prefix include [*tri*]athlon, [*tri*]o, and [*tri*]angle. You can easily remember that the prefix *tri-* means "three" via the word [*tri*]cycle, which is a bicycle with "three" wheels instead of two that promotes stability for young riders.