A difficulty that has to be resolved or dealt with.
A puzzling circumstance.
A set of moves required to complete a climb.
A question to be answered, schoolwork exercise.
Objection.
Difficulty in accepting or understanding or refusal to accept or understand.
Causing a problem; problematic; troublesome.
Difficult to train or guide; unruly.
Proof of ownership of stocks, bonds or other investment instruments.
Property etc. temporarily relinquished to guarantee repayment of a loan.
Something that secures the fulfillment of an obligation or law.
A guarantee.
The condition of not being threatened, especially physically, psychologically, emotionally, or financially.
Something that secures.
An organization or department responsible for providing security by enforcing laws, rules, and regulations as well as maintaining order.
Freedom from apprehension.
A tradeable financial asset, such as a share of stock.ᵂ