safeguard

Từ điển American Heritage Dictionary 4th

safe·guard (sāfʹgärd')n.
1.
a. One that serves as protection or a guard.
b. A mechanical device designed to prevent accidents.
c. A safe-conduct.
2.
a. A protective stipulation, as in a contract.
b. A precautionary measure.tr.v. safe·guard·ed, safe·guard·ing, safe·guards
To ensure the safety of; protect. See Synonyms at defend.

• Từ đồng nghĩa / Synonyms:
  safe-conduct, precaution, guard