What does addle mean?
The definition of addle
Ad”dle, n.
Etym: [OE. adel, AS. adela, mud.]

1 Liquid filth; mire. [Obs.]
2 Lees; dregs. [Prov. Eng.] Wright.

Ad”dle, a.
Having lost the power of development, and become rotten, as eggs; putrid. Hence: Unfruitful or confused, as brains; muddled. Dryden.
Ad”dle, v. t. & i.
[imp. & p. p. Addled; p. pr. & vb. n. Addling.]

To make addle; to grow addle; to muddle; as, he addled his brain. “Their eggs were addled.” Cowper.

Ad”dle, v. t. & i.
Etym: [OE. adlen, adilen, to gain, acquire; prob. fr. Icel. ö\’eblask to acquire property, akin to othal property. Cf. Allodial.]

1 To earn by labor. [Prov. Eng.] Forby.
2 To thrive or grow; to ripen. [Prov. Eng.] Kill ivy, else tree will addle no more. Tusser.