a. 逃脱不掉的, 解不开的, 无法解决的

[ adj ]
not permitting extrication; incapable of being disentangled or untied
<adj.all>
an inextricable knotinextricable unity

Inextricable \In*ex"tri*ca*ble\, a. [L. inextricabilis: cf. F.
inextricable. See {In-} not, and {Extricate}.]
1. Incapable of being extricated, untied, or disentangled;
hopelessly intricate, confused, or obscure; as, an
inextricable knot or difficulty; inextricable confusion.

Lost in the wild, inextricable maze. --Blackmore.

2. Inevitable. [R.] ``Fate inextricable.'' --Milton.