Delirʹium

From the Latin lira (the ridge left by the plough), hence the verb de-liraʹre, to make an irregular ridge or balk in ploughing. Deliʹrus is one whose mind is not properly tilled or cultivated, a person of irregular intellect; and delirium is the state of a person whose mental faculties are like a field full of balks or irregularities. (See Prevarication.)