This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 伵 is uncertain. It visually combines 亻 (person) and 四 (four), but the original semantic or phonetic role of these components is unclear.
A person 亻 beside the number four 四. Since the meaning is unclear, picture a person trying to count to four but getting stuck, representing the uncertainty.
For キョク, imagine a person 亻 holding up four 四 fingers and making a quirky 'kyok' sound: kyok -> キョク.