The term 'deepest affections' can be summed up as the strongest of emotions, usually referring to love. It is often used to describe the feelings that one has for another person or thing. The crossword solution for this term is 'heartstrings, ' which is a metaphor for the emotions that one feels for someone or something. Heartstrings are often used to describe the strong bond between two people, and the intense feelings of love and devotion that they share.