(Noun) The process of thinking back on past experiences.

(Noun) The extent to which something is directly connected to the issue being discussed, to a person or to a specific situation.

(Adjective) Able to be trusted and dependable. 

(Noun) In-depth investigation and study to find information about a specific topic. (Also, verb) The act of doing this.

(Noun) A job that is highly regulated and requires the employee to work in a certain way following a large number of rules.