Converse of object

• have: Mathematica is intimidating at first; it has a steep learning curve.

• experience: Since taking on my new role I have experienced a steep learning curve, but am really enjoying the variety which each day brings.

Adjective modifier

• steep: He said: It's been a steep learning curve.

• sharp: Although it has a sharp learning curve, once learned sophisticated models of interacting organizations and cognitive agents can be swiftly developed.

• initial: But the initial learning curve can be a tough lesson.

• massive: Nik Fiend: It was a massive learning curve.

• great: I do remember that inquiry, and I always think of that as being probably one of my greatest learning curves there.

• significant: As we enter the next millenium, libraries are only at the base of what will be a significant learning curve.