The phrase "under treacherous" is often used to describe a dangerous situation or environment that is full of risks and potential hazards. Some synonyms for this phrase include "amidst perilous circumstances," "in a hazardous setting," "under risky conditions," "in dangerous terrain," and "through treacherous territory." Each of these phrases conveys a similar sense of danger and uncertainty, and can be used interchangeably with "under treacherous" to describe a situation that requires caution and vigilance. Whether navigating treacherous waters, climbing treacherous mountains, or facing treacherous foes, it is important to always be aware of the potential risks and to take precautions to stay safe.