What is the meaning of Irre?

crazy, insane, mad, mental

crazy, incredible, extreme

inflection of irren:

1. first-person singular present
2. first/third-person singular subjunctive I
3. singular imperative

first-person singular present

first/third-person singular subjunctive I

singular imperative

to turn verdigris

to err (stray)

to tease

to anger, aggravate

Source: wiktionary.org