The term "un-complicated" implies that something is straightforward, easy, or uncomplicated. The opposite of this term would represent a challenge, complexity, or difficulty. Antonyms for "un-complicated" could include complicated, complex, intricate, perplexing, difficult, challenging, or convoluted. These words describe situations or problems that require more thought, effort, or expertise to solve than something that is "un-complicated." Similarly, an individual who is "un-complicated" could be referred to as simple, straightforward, easygoing, or uncomplicated. An antonym of this expression might include complex, difficult, challenging, or temperamental, which illustrates that individuals come in various degrees of complexity, just like situations.