IPA: /əˈfɛkʃənl/
KK: /əˈfɛkʃənl/
Relating to feelings or emotions, especially those that show love or care for someone.
Her affectional response to the puppy was immediate and heartfelt.
Affectional is formed from "affectio" (from Latin, meaning a feeling or emotion) and the suffix "-al" (meaning pertaining to). The word affectional refers to something that pertains to feelings or emotions.
Think of 'affectio' as relating to feelings — that's why affectional means pertaining to feelings.