Why “endophasia” is a great word
ENDOPHASIA — [Noun] The silent, internal articulation of speech or verbal thought, without audible vocalization. From the combining form endo- (from Ancient Greek ἔνδον, éndon, "within") + -phasia (from Ancient Greek φάσις, phásis, "utterance, speech"). Unlike exophasia, which is audible speech projected outward, or the broader psychological concept of inner speech, endophasia is the precise, technical term for the private, sub-vocal act itself. It is the meticulous rehearsal of a difficult apology on a solitary walk, the silent, furious recitation of a grocery list, and the perfect, unsaid retort that lingers long after the moment has passed—the soundproof theater where every performance is for an audience of one.