a. 不能溶解的, 不能分解的, 坚固的

Indissoluble \In*dis"so*lu*ble\, a. [L. indissolubilis: cf. F.
indissoluble. See {In-} not, and {Dissoluble}, and cf.
{Indissolvable}.]
1. Not dissoluble; not capable of being dissolved, melted, or
liquefied; insoluble; as, few substances are indissoluble
by heat, but many are indissoluble in water. --Boyle.

2. Incapable of being rightfully broken or dissolved;
perpetually binding or obligatory; firm; stable, as, an
indissoluble league or covenant.

To the which my duties
Are with a most indissoluble tie
Forever knit. --Shak.