What is the root of the word individual?

What is the root of the word individual?

individual (adj.) early 15c., “”one and indivisible, inseparable”” (with reference to the Trinity), from Medieval Latin individualis, from Latin individuus “”indivisible,”” from in- “”not, opposite of”” (see in- (1)) + dividuus “”divisible,”” from dividere “”divide”” (see divide (v.)).