assured or certain

By now victory was secure

archaic overconfident

to fix or fasten (something) firmly

to make (something or somebody) safe from risk or danger; to protect (somebody or something) against intrusion or disturbance

to guarantee (e.g. a right) against loss or denial

to obtain (something), esp as the result of effort

to achieve or effect (something)

(+ against) to make somebody or something secure against risk, danger, or uncertainty

to obtain something

First offer over £500 secures