To add, as an accessory to the principal thing; to annex
To write more data to the end of a pre-existing file, string, or other object.
To hang or attach to, as by a string, so that the thing is suspended
An instance of writing more data to the end of an existing file.
To unravel; to separate into discrete components or units.
To become free or untangled.
To free something from entanglement; to extricate or unknot.