Treacherous Meaning In English. Treacherous implies readiness to betray trust or confidence. Because of bad weather conditions.
From Old French trecherous from trecheor a cheat from trechier to cheat. Treacherous implies readiness to betray trust or confidence. Origin Middle English in treacherous sense 1 of the adjective.
If you describe someone as treacherous you mean that they are likely to betray you and cannot be trusted.
The Characters of Jean de La Bruyre Jean de La Bruyre. Guilty of or characterized by betrayal of confidence or trust. Sailing through treacherous waters. To base our decisions on what we personally feel is right is to depend upon the heart a treacherous guide.