Strong's G2648 — καταμανθάνω (verb)
katamanthano (kat-am-an-than'-o) v.
1. to learn thoroughly
2. (by implication) to note carefully
[from G2596 and G3129]
KJV: consider 
Root(s): G2596, G3129 
Hebrew root: μανθάνω
Occurrences: 1