IPA: /ˈtækiɒn/
KK: /ˈtækiˌɒn/
A theoretical particle that is believed to move faster than light.
Scientists are exploring the concept of tachyons to understand faster-than-light travel.
Tachyon is formed from "tachy-" (from Greek "tachys", meaning swift or fast) and "-on" (a suffix used in physics to denote particles). The word "tachyon" refers to a hypothetical particle that travels faster than light, hence the connection to speed.
Think of 'swift' ('tachy-') to remember that a tachyon is a particle that moves faster than light.
No commonly confused words.