godan verb (-su), transitive verb
cut off; separate; detach; sever; uncouple
Used for physically cutting something away from a whole, or metaphorically for separating or disconnecting things. Often implies a clean, deliberate separation.
枝を木から切り離した。
I cut the branch off from the tree.
その問題を本題から切り離して考えよう。
Let's consider that issue separately from the main topic.