irrational

From Wiktionary

Word parts[change]

ir- + rational

Pronunciation[change]

  • enPR: ĭră'sh(ə)nəl, IPA (key): /ɪˈræʃ.(ə.)nəl/
  • (file)

Adjective[change]

Positive
irrational

Comparative
more irrational

Superlative
most irrational

  1. If something is irrational is it not rational, or it is nonsensical.
    That decision was completely irrational.