IPA: /ʌnˈspɪlt/
KK: /ʌnˈspɪlt/
Not spilled or poured out; remaining in its original container or state.
The unspilt milk sat on the table, untouched and safe.
Unspilt → It is formed from "un-" (meaning not) and "spilt" (the past participle of "spill", which comes from Old English "spillan", meaning to cause to run out or flow). The word "unspilt" means not having been spilled or not having run out.
Think of 'not' ('un-') having 'spilled' — that's why unspilt means something that has not been spilled.