Where does “smooth function” come from?

smooth function (English) comes from English function, from Middle French function, from Latin functiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

smooth function (English): a function that has derivatives of all finite...

Definitions

  1. a function that has derivatives of all finite...

Ancestry of “smooth function”, step by step

smooth function traces back through two separate lines of ancestry.

via English function

StepLanguageWordMeaning
1EnglishfunctionWhat something does or is used for; A...
2Middle Frenchfunctionfunction what something's intended use is
3Latinfunctiōperformance, execution (of a task)
4Latin-tiōtion, -ation, -ing
5Latindissertātiō(spoken) dissertation, discourse, disquisition
6Latindissertusarranged, disposed; explained
7Latindissereresecond-person singular future passive indicative...
8Latindis-asunder, apart, in two; reversal, removal;...
9Latincalceusshoe
10Latincalxlimestone; chalk; the finish line
11Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English smooth

StepLanguageWordMeaning
1EnglishsmoothHaving a texture that lacks friction. Not rough;...
2Middle Englishsmethesmooth not rough
3Old Englishsmōþsmooth, serene, calm, unruffled
4Proto-Germanicsmanþizflat, smooth, soft
Every word from Ancient Greek χάλιξ
smooth function — Etymology, Origin & Word History | Etymology Explorer