/ ˈekwəbl; NAmE / adjective ( formal )
1.
calm and not easily upset or annoyed :
an equable temperament
2.
( of weather ) keeping a steady temperature with no sudden changes
► equ·ably / ˈekwəbli; NAmE / adverb
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WORD ORIGIN
mid 17th cent. (in the sense fair, equitable ): from Latin aequabilis , from aequare make equal, from aequus even, level, equal.