Where does “untidyness” come from?

untidyness (English) comes from English untidy, from English tidy, from Middle English tidy, from English tide, from Middle English tyde, from Old English tīd, from Proto-Germanic tīdiz, from Proto-Indo-European déh₂itis — to share, divide.

Ancestry of “untidyness”, step by step

StepLanguageWordMeaning
1EnglishuntidySloppy; Disorganized; To make untidy, to make a...
2EnglishtidyArranged neatly and in order; Not messy; neat and...
3Middle Englishtidy
4EnglishtideThe periodic change of the sea level,...
5Middle EnglishtydeA time (period), season
6Old Englishtīdtime, period, season; period, season, time;...
7Proto-Germanictīdiztime; period, interval
8Proto-Indo-Europeandéh₂itisinterval, period of time
9Proto-Indo-Europeandeh₂y-to share, divide
10Proto-Indo-Europeandeh₂-to share, divide
Every word from Proto-Indo-European deh₂-