IPA: /ˈfeɪvərəbləs/
KK: /ˈfeɪvərəbəl/
The quality of being favorable or advantageous; a condition that is beneficial or supportive.
The favorableness of the weather made it a perfect day for a picnic.
Favorableness → It is formed from "favor" (from Latin *favorem*, meaning goodwill or support) and "-ableness" (from Old English *-abl*, meaning capable of). The word "favorableness" means the quality of being capable of receiving goodwill or support.
Think of 'favor' as goodwill and remember that 'favorableness' refers to the quality of being open to receiving that goodwill.