How to say "Simple" in Japanese

When translating "simple" into Japanese, you must choose carefully between 単純 and 茅茨土階. In Japanese, 単純 (たんじゅん (tanjun)) is typically associated with "simple, plain" (Syllabus Level: N2) and represents Describes something straightforward, uncomplicated, or naive. Often used as a na-adjective. It can sometimes imply a lack of depth.. On the other hand, 茅茨土階 (ぼうしどかい (boushidokai)) maps to "A simple, humble dwelling" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "simple" can often sound unnatural to native Japanese speakers if mixed up!