English
functionless
From function + -less.
Formed from function + -less
Proto-Indo-European *bʰewg- ‘to enjoy’
…
Latin fungor ‘to perform’
Latin fūnctiō ‘performance’
Old French fonction
Middle French function
English function
Today it means
adj lacking a function
Language periods are conventional ranges, not dates for this word.
Etymograph / functionless