Antonyms of adj level-headed

1 sense of level-headed

Sense 1
healthy, intelligent, levelheaded, level-headed, sound -- (exercising or showing good judgment; "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision")

INDIRECT (VIA reasonable) -> unreasonable -- (not reasonable; not showing good judgment)
                                                                         

Similarity of adj level-headed

1 sense of level-headed

Sense 1
healthy, intelligent, levelheaded, level-headed, sound -- (exercising or showing good judgment; "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision")
       => reasonable (vs. unreasonable), sensible -- (showing reason or sound judgment; "a sensible choice"; "a sensible person")