treacherous

showing a lack of trust or loyalty; dishonest and harmful to someone you should be loyal to

traidor, desleal, engañoso

• [T + obj]
• [predicative adjective]

Collocations treacherous friend · treacherous betrayal

• He was accused of being treacherous.

  Se le acusó de ser traicionero.

very dangerous or difficult to deal with; likely to cause harm, injury, or death

peligroso, traicionero (en sentido figurado)

• [T + obj]
• [predicative adjective]

Collocations treacherous terrain · treacherous waters

• The road was treacherous in the rain.

  La carretera era peligrosa en la lluvia.