1. 解开，解松（绳结）
If you untangle something that is knotted or has become twisted around something, you undo the knots in it or free it.

2. 排解，解决，处理（混乱或复杂的局面）
f you untangle a confused or complicated situation, you make the different things involved clear, or put the situation right.

1. become or cause to become undone by separating the fibers or threads of

e.g. unravel the thread

Synonym: unravelunknotunscrambleunpick

2. release from entanglement of difficulty

e.g. I cannot extricate myself from this task

Synonym: extricatedisentangledisencumber