Unlearned - Vine's Expository Dictionary of New Testament Words
Unlearned
[ 1,,G62, agrammatos ]lit., unlettered" (grammata, "letters:" grapho, "to write"), Acts 4:13, is explained by Grimm-Thayer as meaning "unversed in the learning of the Jewish schools;" in the papyri, however, it occurs very frequently in a formula used by one who signs for another who cannot write, which suggests that the rulers, elders and scribes regarded the Apostles as "unlettered" (Moulton and Milligan).
[ 2,,G261, amathes ]
"unlearned" (manthano, "to learn"), is translated "unlearned" in 2 Peter 3:16, AV (RV, "ignorant").
[ 3,,G521, apaideutos ]
"uninstructed" (paideuo, "to train, teach"), is translated "unlearned" in 2 Timothy 2:23, AV (RV, "ignorant").
Note: For idiotes, rendered "unlearned" in 1 Corinthians 14:16, 1 Corinthians 14:23-24, See IGNORANT, No. 4.