IPA: /ʌnˈtrʌst/
KK: /ʌnˈtrʌst/
Not tied or fastened securely.
The untrussed package fell off the shelf and spilled its contents.
Untrussed → It is formed from "un-" (meaning not) and "trussed" (from Old French *trusser*, meaning to tie up or bundle). The word "untrussed" means not tied up or released from being bundled.
Think of something that is 'not tied up' — 'un-' means not, and 'trussed' refers to being tied or bundled.