This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
伌 combines 亻 (person) with 厄, which may have contributed a sound or meaning, but the exact historical development is uncertain.
A person 亻 beside 厄, a shape associated with misfortune or hardship. Imagine someone enduring a difficult situation, but the exact meaning is unclear.
For アイ, imagine a person crying out 'Ai!' in distress beside the hardship shape 厄: Ai -> アイ.