mid-15c., "condition of being secure," from Latin securitas, from securus "free from care" (see secure). Replacing sikerte (early 15c.), from an earlier borrowing from Latin; earlier in the sense "security" was sikerhede (early 13c.); sikernesse (c. 1200).
Meaning "something which secures" is from 1580s; "safety of a state, person, etc." is from 1941. Legal sense of "property in bonds" is from mid-15c.; that of "document held by a creditor" is from 1680s. Phrase security blanket in figurative sense is attested from 1966, in reference to the crib blanket carried by the character Linus in the "Peanuts" comic strip (1956).
例文
1. It 's an open secret that the security service bugged telephones.
セキュリティ部門が電話を盗聴するのは誰もが知っている秘密です。
2.Today 's Security Council resolution will be a significant success for American diplomacy.今日の安保理決議は、米国外交にとって大きな成功である。
3.Wherever they went they were closely followed by security men.
どこに行っても警備員は彼らの後ろについている。
4.The exact locations are being kept secret for reasons of security .
正確な場所は安全上の理由で秘密にしてください。
5.The security zone was set up to prevent guerrilla infiltrations.