not equal; not of the same quantity, quality, value, rank, ability, etc.

People are unequal in their capacities.

not adequate, as in amount, power, ability, etc. (usually fol. by to )

strength unequal to the task.

not evenly proportioned or balanced; not having the parts alike or symmetrical

an unequal leaf.

uneven or variable in character, quality, etc.

Obsolete . inequitable; unfair; unjust.

unequals, persons or things not equal to each other

a contest between obvious unequals.