くぎをさす

釘を刺す

to give a warning; to remind (a person) of; to drive in a nail

N3Expression
Expression, Godan verb (su ending)
to give a warningto remind (a person) ofto drive in a nail

Example Sentences

実際はそんなことあるわけないが、釘を刺すにはちょうどよさそうだ。

There's no way something like that would really happen, but it seemed just right to drive the point home.