a. 不可避免的, 无法逃避的

[ adj ]
impossible to avoid or evade:
<adj.all>
inescapable conclusionan ineluctable destiny
an unavoidable accident

Ineluctable \In`e*luc"ta*ble\, a. [L. ineluctabilis; pref. in-
not + eluctabilis to be surmounted, fr. eluctari to struggle
out of, to surmount: cf. F. in['e]luctable. See {Eluctate}.]
Not to be overcome by struggling; irresistible; inescapable;
inevitable. --Bp. Pearson.

The ineluctable conditions of matter. --Hamerton.