security
noun
[ sɪˈkjʊərɪti ]
• the state of being free from danger or threat.
• "the system is designed to provide maximum security against toxic spills"
• a thing deposited or pledged as a guarantee of the fulfilment of an undertaking or the repayment of a loan, to be forfeited in case of default.
Similar:
guarantee,
collateral,
surety,
pledge,
bond,
hostage,
pawn,
backing,
bail,
gage,
earnest,
• a certificate attesting credit, the ownership of stocks or bonds, or the right to ownership connected with tradable derivatives.
Origin:
late Middle English: from Old French securite or Latin securitas, from securus ‘free from care’ (see secure).