Treacherous \Treacher*ous\, a. [See Treacher.] Like a traitor; involving treachery; violating allegiance or faith pledged; traitorous to the state or sovereign; perfidious in private life; betraying a trust; faithless. [1913 Webster] Loyal father of a treacherous son.
Fuel Safety Tips. 1  If you need to transport fuels such as propane, gasoline or oil, it should only be carried in approved containers certified by agencies such as the Canadian Standards Association or Underwritersâ Laboratories of Canada. 2  Containers should never be filled right to the top.
How to use a gas heater safely. 1  use an unflued gas heater in a bathroom, bedroom or caravan. Toxic gases may cause serious health problems in these situations. 2  use or store solvents, aerosols or pressure pack cans near a gas heater â even if the heater is turned off, the pilot light may still be on.