The mysterious thoughts of an introvert, whether it be at 3am or 1pm. Esoteric ˌɛsəˈtɛrɪk,ˌiːsəˈtɛrɪk/ adjective intended for or likely to be understood by only a small number of people with a specialized knowledge or interest. Musing ˈmjuːzɪŋ/ noun 1. a period of reflection or thought. adjective 1. characterized by reflection or deep thought.