1The treacherous terrain of the mountain made it difficult for the rescue team to reach the stranded hikers.
2Was the company's decision to downsize a treacherous move, or was it a necessary evil?
3The politician's treacherous behavior during the campaign led to a significant loss of public trust.
4Navigating the treacherous waters of office politics requires a great deal of tact and diplomacy.
5The treacherous weather conditions forced the pilot to make an emergency landing at the nearest airfield.