in·dis·sol·u·ble /ˌɪndɪˈsɑljəbəl/
(a.)不能溶解的,不能分解的,堅固的
In·dis·so·lu·ble a.
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.
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.
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indissoluble
adj 1: not soluble
2: used of decisions and contracts