According to this dictionary entry, what is the origin of the word skeptic? skep-tic (skep'tik) [Lat. skepticus < Gk. skeptikos, thoughtful, inquiring, going back to IndoEur. base spek-, to peer, to watch closely] n. 1. [S-] a member of a Greek school of philosophers that expressed doubt about generally accepted ideas 2. a person who typically doubts or questions matters that are generally accepted.