A scholar making his best efforts to reach a secondary Shariah ruling based on the relevant proofs.
"Istinbāt": deduce. It is derived from "anbat", which means "extract" and originally comes from "nabat", which is the water that comes out of the well immediately after it is dug up.
"Mujtahid": someone who exerts his utmost efforts to reach something. It is derived from "jahd", which means: hardship, tiredness. Other meanings: an earnest pursuer of a certain goal.
"Fiqh": realizing, knowing. "It is derived from "faqīh", which means: scholar, knowledgeable person. Original meaning: opening, splitting; hence, knowledge was called "fiqh" because the person who has knowledge cuts through meanings and opens up what is closed (ambiguous) thereof. Other meanings: understanding.
Legally accepted personal reasoning whose general and special conditions are fulfilled.
Scholars who fulfill the requirements of deducing legal rulings from their proofs.
Confirming the presence of the cause, upon which there is an agreement based on a text, consensus or deduction, concerning a disputed case.
A number of sciences which are used as a means to understanding the Qur’an and the Sunnah.
Perception based on the mind's thinking, reflection, and inference.