IPA: /ʌnˈtɛðər/
KK: /ʌnˈtɛðər/
To release or set free from a physical or metaphorical connection or restraint.
The astronaut was untethered from the spacecraft to float freely in space.
Past: untethered
Past Participle: untethered
Untether → It is formed from "un-" (meaning not) and "tether" (from Old Norse *þveita*, meaning to tie or fasten). The word "untether" means to not tie or fasten something, allowing it to move freely.
Think of something that is 'not tied' ('un-') — that's why untether means to release or free something from being tied.