OPTIONALITY Antonyms

• the state of being physically constrained

• a device that retards something's motion

• the act of constraining; the threat or use of force to control the thoughts or behavior of others

• the social force that binds you to the courses of action demanded by that force

• work that you are obliged to perform for moral or legal reasons

• a government tax on imports or exports

• basic importance

• the quality possessed by something that you cannot possibly do without

• a document giving an official instruction or command

• a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they are able to stand by themselves

• the commission that is given to a government and its policies through an electoral victory

• assign under a mandate

• make mandatory

• assign authority to

• the condition of being essential or indispensable

• anything indispensable

• the social force that binds you to the courses of action demanded by that force

• the state of being obligated to do or pay something

• a personal relation in which one is indebted for a service or favor

• a written promise to repay a debt

• a legal agreement specifying a payment or action and the penalty for failure to comply

• required activity

• anything indispensable

• something that is required in advance