inexcitabilityrare.|ɪnɛkˌsaɪtəˈbɪlɪtɪ| [f. next: see -ity.] The quality of being unexcitable; constitutional calmness. 1864in Webster.1876T. Hardy Ethelberta xxviii. (1890) 201 She had set him down to be a man whose external inexcitability owed nothing to self-repression.