The word 'systemic' is a modern scientific adjective formed from the noun 'system'. Its core, 'system', entered English in the early 17th century from Late Latin systema, which itself originated from Greek sustēma, meaning "organized whole, body". This Greek term was derived from the verb sunistanai ("to combine, set together"), composed of syn- ("together") and histānai ("to cause to stand"). The adjectival suffix -ic, of Greek origin via Latin, was appended to create a term meaning "pertaining to or affecting a system as a whole". The logic of the word's formation is direct: from the concept of a unified, interconnected whole (system), it gains the property of describing something that operates on or impacts that entire integrated structure, a meaning prominently applied in biology, medicine, and social sciences.

Structure: system (organized whole) + ic (adjective-forming suffix) - system: From Greek sustēma (a whole compounded of several parts), via Late Latin systema. Functions as the core noun root. - ic: From Latin -icus, Greek -ikos (adjective-forming suffix meaning "of, pertaining to"). Functions as a suffix that converts a noun into an adjective.