IPA: /əˈfɛkʃənləs/
KK: /əˈfɛkʃənləs/
Not able to show love or warmth; lacking feelings of kindness or care.
His affectionless demeanor made it difficult for others to connect with him.
Affectionless is formed from "affection" (from Latin "affectio", meaning a feeling or emotion) and "-less" (meaning without). The word describes a state of being without feelings or emotions, particularly love or warmth.
Think of 'affection' as a feeling of warmth and care, and remember that 'affectionless' means lacking that warmth.