IPA: /ʌnˈtɪpɪkəl/
KK: /ʌnˈtɪpɪkəl/
Not usual or common; different from what is expected or typical.
Her behavior was untypical for someone in her position.
Untypical → It is formed from "un-" (meaning not) and "typical" (from Greek "typos", meaning a model or pattern, combined with the suffix "-ical", meaning pertaining to). The word "untypical" means not pertaining to a model or pattern, or not typical.
Think of 'not' ('un-') being added to something that is a 'model' or 'pattern' ('typical') — that's why untypical means not typical.