unbreakable

About 0.34 uses per million words.

Meaning

1. adjective Difficult or impossible to break and therefore able to withstand rough usage.

   unbreakable comb

2. adjective Resilient.

   the unbreakable spirit of the rebels

3. adjective Not able to be broken in.
4. noun Something that cannot be broken.

Similar words

infrangible inviolable splinterless shatterproof splinterproof unswerving unshakable unwavering unyielding unrelenting

Often followed by

bond and chain rule bonds glass link unity plastic