preserver
🇺🇸
/prɪˈzɜːrvər/
🇬🇧
/prɪˈzɜːvə(r)/
someone who keeps something from changing or being damaged
The lifeguard is a preserver of swimmers' safety at the beach.
救生員はビーチで泳ぎ手の安全を守る者です。
a chemical that stops wood from rotting
The woodworker applied a preservative to protect the fence from insects and weather.
木工は虫と天候からフェンスを守るために保存剤を塗りました。