untangle

verb (used with object), un·tan·gled, un·tan·gling.

1. to bring out of a tangled state; disentangle; unsnarl.
2. to straighten out or clear up (anything confused or perplexing).

verb (tr)

1. to free from a tangled condition
2. to free from perplexity or confusion

v.1540s, from un- (2) + tangle. Related: Untangled; untangling.