Unconnected is a related term of severed.
As adjectives the difference between unconnected and severed
is that unconnected
is not connected or joined while severed
is separated, cut off or broken apart.
As a verb severed is
not connected or joined
confused or disconnected
- The light wouldn't work because the cable was unconnected .
- He talked in an unconnected series of short sentences.
separated, cut off or broken apart
- a severed limb