fool with

Verb

transitive

(transitive) To involve oneself with in a dangerous and reckless manner.

Japanese Meaning

危険で無謀な方法で関わる / 軽率に、危険な形で関与する

Don't fool with the ancient machinery; you could seriously hurt yourself.

古い機械に不用意に手を出すな。大けがをするかもしれない。

Sense（1）

(transitive) To involve oneself with in a dangerous and reckless manner.

If you fool with the Mafia, expect to get hurt.

fools with

（ present singular third-person ）

fooling with

（ participle present ）

fooled with

（ participle past ）

fooled with

（ past ）