C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/
unprepossessing
魅力的でない
Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
彼は魅力的でない外見にもかかわらず、非常に親切で賢かった。