IPA: /ˌʌn.rɪəˈlɪs.tɪ.kli/
KK: /ʌnˌriːəˈlɪstɪkli/
In a way that does not reflect reality or is not practical.
The movie portrayed the events unrealistically, making them seem more dramatic than they really were.
Unrealistically → It is formed from "un-" (meaning not), "real" (from Latin "realis", meaning actual or true), and "-istically" (from Greek "-istikos", meaning pertaining to). The word describes something that is not true or actual in a manner that pertains to unrealistic expectations or ideas.
Think of 'not' ('un-') being combined with 'true' ('real') and the suffix that means 'pertaining to' ('-istically'). This helps you remember that 'unrealistically' refers to ideas or expectations that are not true or actual.