Synonyms of be proof against something or someone
be proof against something or someone
resistIf someone or something resists damage of some kind, they are not damaged.
• bodies trained to resist the cold
withstandIf something or someone withstands a force or action, they survive it or do not give in to it.
• A politician has to be able to withstand criticism from the Press.
Thesaurus for be proof against something or someone from the Collins English Thesaurus