think, look forward to
怤 centers on a mental state of anticipation and consideration: thinking about something while looking forward to it. The two given meanings are closely linked as a forward-looking, hopeful kind of thought.
怤 combines 付 (likely phonetic) with 心 (heart/mind), suggesting a mental or emotional state. The exact historical development is uncertain, but the structure points to a phono-semantic compound where 付 contributes the sound and 心 the meaning.
The top 付 can suggest 'attach' or 'apply', and the bottom 心 is the heart/mind. Imagine attaching your mind to a future event, thinking about it and looking forward to it with anticipation.
For フ, picture a person thinking about the future while humming a hopeful tune: 'fu, fu, fu…' The soft humming sound cues フ, and the forward-looking thought matches the meaning.