inappreciation|ɪnəpriːʃɪˈeɪʃən| [in-3.] Want of appreciation; failure to appreciate or estimate duly. 1864in Webster.1869J. Martineau Ess. II. 120 This strange inappreciation of the relative position.1881Mrs. C. Praed Policy & P. I. 263 Embittered by disappointment and inappreciation.