adjective

indissoluble

in-dih-SAHL-yuh-bul/ˌɪndɪˈsɑːljəbl/

Impossible to break apart.

The seamless steel rings form an indissoluble bond despite the load pulling them apart.

Two seamless interlocked steel rings remain inseparable under a load that has snapped an ordinary cord, presenting a concrete unbreakable bond rather than another liquid-separation scene.

Etymology

inLatinnot

+disLatinapart

+solubleLatinable to be loosened or dissolved

Solubilis describes what can be loosened or dissolved; dis- adds the idea of coming apart, and in- negates it. Indissoluble thus describes something that cannot be dissolved, broken apart, or brought to an end.

More examples

Their faith teaches that marriage is indissoluble.
The treaty declares the union of the states indissoluble.
She sees trust and respect as parts of an indissoluble whole.

Forms

indissoluble

indissolubly adverb — In a way that prevents separation.

Similar words

unbreakable: Applies more broadly to objects that resist physical damage.
inseparable: Often describes close companions, not necessarily an unbreakable bond.