The state of being out of proportion; an abnormal or improper ratio; an imbalance.

“the disproportion of the length of a building to its height”

Lack of suitableness, adequacy, or due proportion to an end or use; unsuitableness.

“the disproportion of strength or means to an object”

To make unsuitable in quantity, form, or fitness; to violate symmetry in; to mismatch.