causal

Etymology

Borrowed from Late Latin causalis, from Latin causa (“cause”); see cause.

adj

1. of, relating to, or being a cause of something; causing
   There is no causal relationship between eating carrots and seeing in the dark.
   Time changes attitudes, and while Hart's actions in driving when not fit to do so were certainly in the causal chain of the Great Heck accident, how many other drivers were out there driving when too fatigued to do so? February 24 2021, Greg Morse, “Great Heck: a tragic chain of events”, in RAIL, number 925, page 44

noun

1. (grammar) a word (such as because) that expresses a reason or a cause