equable
adjective /ˈekwəbl/
/ˈekwəbl/
(formal)- calm and not easily upset or annoyed
- an equable temperament
- He was in a remarkably equable mood when he spoke to reporters last night.
- (of weather) keeping a steady temperature with no sudden changes
- an equable climate
Word Originmid 17th cent. (in the sense ‘fair, equitable’): from Latin aequabilis, from aequare ‘make equal’, from aequus ‘even, level, equal’.