Where does “guesstimation” come from?

guesstimation (English) comes from English estimation, from Middle English estimacioun, from Old French estimacion, from Latin aestimatio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

guesstimation (English): An estimation made without good justification and...

Definitions

  1. An estimation made without good justification and...

Ancestry of “guesstimation”, step by step

guesstimation traces back through two separate lines of ancestry.

via English estimation

StepLanguageWordMeaning
1EnglishestimationThe process of making an estimate; The amount,...
2Middle Englishestimacioun
3Old Frenchestimacion
4Latinaestimatiovaluation, estimation according to its worth,...
5Latin-tiōtion, -ation, -ing
6Latindissertātiō(spoken) dissertation, discourse, disquisition
7Latindissertusarranged, disposed; explained
8Latindissereresecond-person singular future passive indicative...
9Latindis-asunder, apart, in two; reversal, removal;...
10Latincalceusshoe
11Latincalxlimestone; chalk; the finish line
12Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English guess

StepLanguageWordMeaning
1EnglishguessTo reach a partly unqualified conclusion; To...
2Middle Englishgessento guess; to suppose
3Old Danishgetse
4Old Norsegetsa
5Proto-Germanicgitisōnąto guess
6Proto-Germanicgetanąto attain, acquire, get, receive, hold
7Proto-Indo-Europeanǵʰed-to defecate
Every word from Ancient Greek χάλιξ