Entry 1 sense Webster, 1913 Inapprehensible /ĭnăprĭhĕnʹsĭbl/ · In·ap·pre·hen·si·ble · IPA /ɪnæpɹɪˈhɛnsɪbl/ 01 a. Not apprehensible; unintelligible; inconceivable. 1. Not apprehensible; unintelligible; inconceivable.