The word "in-complex" is a term that refers to the opposite of a complex or complicated situation. Here are some synonyms for the term that can be used in various contexts: easy, straightforward, simple, uncomplicated, effortless, clear-cut, trouble-free, facile, uninvolved, elemental, plain, unassuming, basic, unchallenging, undemanding, simple-minded, elementary, and naive. Each of these words can be used interchangeably with "in-complex" depending on the context of the sentence and the tone of the piece. Using appropriate synonyms can enhance the quality of the text and provide clarity to the readers.