This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 忬 is uncertain. It visually combines 忄 (heart) with 予, but the original semantic or phonetic role of 予 in this character is unclear.
With no clear meaning, picture the heart radical 忄 beside 予 as a heart giving something in advance, but remember that this is just a visual placeholder.
For ヨ, imagine a heart (忄) giving a yo-yo (ヨ) to someone in advance, even though the meaning is uncertain.