adjective
BAD : The police telephoned his parents to tell them that he was save.
GOOD : The police telephoned his parents to tell them that he was safe.
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Save /seIv/ is a verb: 'This new drug is likely to save hundreds of lives.' 'Thanks to the local fire brigade, all three children were saved.'
The adjective is safe /seIf/: 'Since the break-in, I never feel safe in the house.' 'You should keep your passport somewhere safe.'