Unsophisticated
/ˌʌnsəˈfɪstɪˌkeɪtɪd/
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Definition
(adj) Not sophisticated; lacking sophistication.
Sentence Examples
Tom is quite unsophisticated.
I think Tom's unsophisticated.
CEFR Practice Quiz
Compared to modern devices, the early computers were quite ____ and could only perform simple and basic tasks today.