Bottom radical is 'heart', (心),top is a character only found in Chinese
meaning 'unison'. It includes a radical meaning 'trimming tool/sharp weapon',
which symbolized 'trimming' and 'making correct', and 'mouth/say' (口). This
radical acts phonetically to express 'sway', thus: 'all hearts swayed in
unison'. Henshall suggests taking the 'trimming tool' as a variant of the 'halberd' radical,
and the stroke above 'mouth' as 'one' (一), and as a mnemonic: 'One
in halberd in mouth causes feeling in heart.' Why can't fortune cookie
fortunes be like that?
Oh, and halberds... Mmmm, girls with halberds...