syn·aes·the·sis \ˌsinə̇sˈthēsə̇s\noun (-es) Etymology: Greek synaisthēsis joint sensation, joint perception, from the stem of synaisthanesthai to perceive simultaneously, to share in perception (from syn- + aisthanesthai to perceive) + -sis — more at audible : harmony of different or opposing impulses produced by a work of art < synaesthesis of thought and feeling in philosophical poetry > < synaesthesis of anxiety and calmness in a tragedy > — compare synesthesia