safeguard - definition and synonyms

verb [transitive] 

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/ˈseɪfˌɡɑː(r)d/
present tense
I/you/we/theysafeguard
he/she/itsafeguards
present participlesafeguarding
past tensesafeguarded
past participlesafeguarded
  1. to protect something or someone from being harmed or having problems

    We hope that world leaders can agree on a plan to safeguard the environment.

    safeguard someone/something against something:

    The company was blamed for failing to safeguard workers against dangerous chemicals.