That operates to produce an effect.
Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.
An operative person or thing.
Planned with study; deliberate; studied.
Given to thought, or to the examination of subjects by contemplation; contemplative.
Favorable to study; suitable for thought and contemplation
Dedicated to study; devoted to the acquisition of knowledge from books
Earnest in endeavors; attentive; diligent