A'ddle. adj. [from aꝺl, a disease, Sax. according to Skinner and Junius; perhaps from ẏꝺl, idle, barren, unfruitful.] Originally applied to eggs, and signifying such as produce nothing, but grow rotten under the hen; thence transferred to brains that produce nothing.
There's one with truncheon, like a ladle,
That carries eggs too fresh or addle;
And still at random, as he goes,
Among the rabble rout bestows. Hudibras, p. ii. cant. ii.
After much solitariness, fasting, or long sickness, their brains were addle, and their bellies as empty of meat as their heads of wit. Burton on Melancholy.
Thus far the poet; but his brains grow addle:
And all the rest is purely from this noddle. Dryd. Don Seb.