IPA: /vɒlˈkeɪnɪsɪti/
KK: /vɑlˈkænɪsɪti/
The quality or state of being related to or characteristic of a volcano.
The volcanicity of the region is evident from the numerous hot springs and lava flows.
Volcanicity → It is formed from "volcanus" (Latin for volcano, meaning a mountain that emits fire) and the suffix "-icity" (from Latin "-icitas", meaning the quality or state of). The word "volcanicity" refers to the quality or state of being volcanic, particularly in relation to volcanic activity.
Think of a volcano ('volcanus') that has a certain 'quality' ('-icity') of activity — that's what volcanicity means.