Unaligated

Unbound or modified? what is the meaning of this?

I call someone and they always say the number is not busy or ringing. what is the meaning of this?

The word is not assigned, not a stranger.

Non-assignment does not mean dedication to anyone. You can assign a number to a person and then connect to that number. It's like asking for a number.

An unallocated number is an unsafe number or an unused number.

Untied is a new word, so you can take whatever it means.

No algae means there are no crocodiles in this pond.