How to say "Simple" in Japanese

When translating "simple" into Japanese, you must choose carefully between 単純 and 粗飯. 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, 粗飯 (そはん (sohan)) maps to "simple meal; plain meal; humble meal; poor meal" (Syllabus Level: N1) and represents Often refers to a very simple, unpretentious meal, sometimes implying poverty or a lack of luxury. It can also be used self-deprecatingly when offering food, as in 「粗飯ではございますが」. A literal translation of "simple" can often sound unnatural to native Japanese speakers if mixed up!