treacherous
🇺🇸
/ˈtretʃərəs/
🇬🇧
/ˈtretʃərəs/
Someone who is not loyal and may harm you.
He was weak, cowardly, and treacherous.
彼は弱々しく、臆面もなく、裏切り者であった。
A situation that is unsafe, even if it looks safe.
The ice on the roads made driving conditions treacherous.
道路の氷で運転状況が危険になりました。