perfideとは何ですか？ perfideはtreacherousです
treacherousとは何ですか？
- Qui est sournois, venimeux, fourbe : De perfides allusions.
That is sneaky, venomous, deceitful: of treacherous allusions.
- Littéraire. Qui est funeste, dangereux, sous des apparences favorables : Les eaux perfides l'ont englouti.
Literary. That is disastrous, dangerous, under favorable appearances: the treacherous waters have engulfed him.