MOST AFFECTIONATE' MOST AFFECTIONATE is an adjective used to describe someone who shows a great deal of love and care for another person. It is often used to describe a person who is very caring and loving towards their family, friends, or significant other. FONDEST is the superlative form of the adjective FOND, which means to have a strong feeling of love and affection for someone. Therefore, MOST AFFECTIONATE is the highest degree of fondness one can have for another person.