The word "treacherous" describes something or someone that is dangerously unstable or untrustworthy. It typically refers to situations or individuals that seem safe but can cause harm or betrayal unexpectedly. It is often used to describe deceptive paths, unreliable friends, or risky actions that could lead to danger.
The word "treacherous" comes from the Middle English term "trecherous," which stems from the Old French word "trechereus," derived from the Latin "traditor" meaning "betrayer." Its roots suggest a connection to deceit and betrayal.