This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
忶 combines 忄 (heart) with 云, but the exact historical development and original meaning are uncertain.
The heart radical 忄 beside 云 suggests a state of mind, but the meaning is unclear. Imagine a clouded heart, uncertain and wavering.
For コン, picture a confused heart (忄) trying to connect (コン) with a cloud (云): connect -> コン, but the heart remains uncertain.