そぼく
simple; artless; naive; unsophisticated
JLPT N1 Common word Also written 素樸
Na-adjective, Noun
マリーは素朴そぼくな学生がくせいだ。
Marie is a naive student.
素朴そぼくな疑問ぎもんなんだけど、・・・トラとライオンはどっちが強つよいの？
This may be a silly question, but which is stronger - a tiger or a lion?