the.com/treacherous
Betrayal wearing the face of safe footing.
means Either willing to betray trust, or dangerously unreliable in a way that hides until it strikes.
from From Old French trichier, to cheat or trick — the same root that quietly slithered into trickery, marking the word with deceit from birth.
Double dutyDescribes both traitors and slippery winter roads.
Hidden dangerImplies risk concealed behind apparent safety.
Word cousinShares roots with trick and trickster.