If a plan, remark, or move is ill-advised, it is not wise, and it is likely to cause trouble later. We use it more about the action than about the person: an ill-advised comment is common; calling someone ill-advised is possible but less usual.

If a plan, remark, or move is ill-advised如果一個計畫、言論或做法是ill-advised，it is not wise它就是不明智的，and it is likely to cause trouble later而且以後很可能會惹麻煩。We我們 use it more about the action than about the person比較常用在行為上而不是人身上：an ill-advised comment is common一句ill-advised的話很常見；calling someone ill-advised is possible but less usual說某人是ill-advised也可以，但比較少見

It is fairly formal. In everyday talk people more often say that was a bad idea.

It它 is fairly formal算是滿正式的說法。In everyday talk在日常對話裡 people更常 more often say that was a bad idea說that was a bad idea

The feeling is not only “wrong in this moment,” but “this will probably come back to hurt you.” Though actually, advised here does not always mean someone sat you down and gave you advice. It means the thing was not carefully thought through — whether the problem was poor advice, no advice, or a rush of feeling.

The feeling這種感覺 is not only 'wrong in this moment,'不只是「現在這樣做不對」，but 'this will probably come back to hurt you.'而是「以後很可能會反過來傷害你」。Though actually不過事實上，advised這裡的advised here does not always mean someone sat you down and gave you advice不一定是指有人特地坐下來給你建議。It它 means the thing was not carefully thought through是指這件事沒有被好好想清楚──whether the problem was poor advice, no advice, or a rush of feeling不管問題出在建議不好、根本沒建議，還是一時衝動

It is not related to being ill in the sense of sick.

It它 is not related to being ill in the sense of sick跟生病的ill沒有關係