简单 (jiǎn dān) means simple or easy. 简 means brief or concise and 单 means single or uncomplex. Together they describe something that is not complicated. Like English simple, 简单 can mean straightforward (简单的问题, a simple question), plain or unadorned (简单的生活, a simple life), or even simple-minded (他有点简单, he is a bit naive). It contrasts with 复杂 (fù zá, complicated). 说起来简单 (easy to say) is a very common setup for contrast.