Before a compliment is given, it has to hit a very narrow sweet spot between common usage and too obscure. Common equals no compliments. Too obscure and you don’t know it’s meaning or if it adds anything of value. You spend the time you’d be giving a compliment asking what it means and the conversation train has broken down. The most compliment deserving are word or short phrases that distill complicated ideas into something simpler - more elegant. But let’s face it, for many of us, written and verbal communication is hard.