impecable
/impeˈkable/ · B2 · adj
impeccable
✨ impecable = im- (not) + pecar (to sin/err) → cannot be faulted
From Latin im- (not) + peccare (to sin, to stumble). Something impecable has no slip, no sin, no flaw. English impeccable is a direct cousin, so the Spanish word is spelled almost the same, just with one c.