The quality of being fixed in place as by some firm attachment.

synonyms: fastness, fixedness, fixture, secureness.

Roget 265: rest; stillness etc. adj.; quiescence; stagnation, stagnancy; fixity, immobility, catalepsy; indisturbance^†; quietism.    quiet, tranquility, calm; repose etc. 687; peace; dead calm, anticyclone^†; statue-like repose; silence etc. 203; not a breath of air, not a mouse stirring; sleep etc. (inactivity) 683.    pause, lull etc. (cessation) 142; stand still; standing still etc. v.; lock; dead lock, dead stop, dead stand; full stop; fix; embargo.    resting place; gite [Fr.]; bivouac; home etc. (abode) 189; pillow etc. (support) 215; haven etc. (refuge) 666; goal etc. (arrival) 292.    ... show more

Dutch: kleurechtheid

The quality of being incapable of mutation:
— Darwin challenged the fixity of species.

synonyms: immutability, immutableness.