Where does “unoccupancy” come from?

unoccupancy (English) comes from English occupancy, from English occupant, from Latin occupans, from Latin occupō, from Latin ob-, from Latin obolus, from Ancient Greek ὀβολός, from Ancient Greek ὀβελός — to throw, reach, pierce; to hit by throwing.

Ancestry of “unoccupancy”, step by step

unoccupancy traces back through two separate lines of ancestry.

via English occupancy

StepLanguageWordMeaning
1EnglishoccupancyThe act of occupying, the state of being occupied...
2EnglishoccupantA person who occupies an office or a position; A...
3Latinoccupansoccupying, filling, taking up; seizing, invading,...
4Latinoccupōto occupy, fill, take up
5Latinob-towards; against
6Latinobolusobolus (Greek coin)
7Ancient Greekὀβολόςobol, obolus, used at Athens as both a weight and...
8Ancient Greekὀβελόςa spit, rod; a horizontal line
9Ancient Greekβέλοςmissile, arrow, dart; weapon; something quickly...
10Proto-Indo-EuropeangʷélHos
11Proto-Indo-EuropeangʷelH-to throw, reach, pierce; to hit by throwing

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European gʷelH-
unoccupancy — Etymology, Origin & Word History | Etymology Explorer