Omission to do something, whether or not it was attempted, especially something that ought to have been done.
State or condition of not meeting a desirable or intended objective, opposite of success.
Bankruptcy.
An object, person or endeavour in a state of failure or incapable of success.
Termination of the ability of an item to perform its required function; breakdown.
Capacity to do something well; technique, ability. Skills are usually acquired or learned, as opposed to abilities, which are often thought of as innate.
Great, excellent.
To know; to understand.
To have knowledge or comprehension; discern.
To set apart; separate.
To discern; have knowledge or understanding; to know how (to).
To have personal or practical knowledge; be versed or practised; be expert or dextrous.
To spend acquired points in exchange for skills.