As adjectives the difference between disloyal and treacherous
is that disloyal
is without loyalty; faithless, traitorous while treacherous
is exhibiting treachery.
without loyalty; faithless, traitorous.
* 1623 , , Act i, scene 1,
- O disloyal thing, That shouldst repair my youth, thou heap'st A year's age on me.
Deceitful; inclined to betray.
- a treacherous mountain trail
* (exhibiting treachery) loyal