The words " willy-nilly" come from a phrase " Will I, nill (nill) I."

“willy-nilly”这个词来自一个短语“Will I, nill (nill) I”。

" Nill" means that you are not willing to do something, but it's a very old word, and we don't use " nill" (nill) anymore in spoken or written English.

“Nill” 表示你不愿意做某事，但这是一个很古老的词， 我们在口语或书面英语中不再使用“nill” （尼尔）。