IPA: /ɪˈkwæb(ə)lnəs/
KK: /ɪˈkwæb(ə)lnəs/
The quality of being calm, stable, and not easily disturbed or changed.
Her equableness in stressful situations helped the team stay focused.
Equableness → It is formed from "equable" (from Latin "aequabilis", meaning even or level) and the suffix "-ness" (meaning the state or quality of). The word "equableness" refers to the state of being even-tempered or calm.
Think of 'equable' meaning calm or even, and remember that 'equableness' describes the quality of being calm and steady.