Where does “underobturation” come from?

underobturation (English) comes from English obturation, from Latin obtūrātiō, from Latin obturo, from Latin ob-, from Latin obolus, from Ancient Greek ὀβολός, from Ancient Greek ὀβελός, from Ancient Greek βέλος — to throw, reach, pierce; to hit by throwing.

underobturation (English): obturation; an imperfect stopping up, or underfilling

Definitions

  1. obturation; an imperfect stopping up, or underfilling

Ancestry of “underobturation”, step by step

underobturation traces back through two separate lines of ancestry.

via English obturation

StepLanguageWordMeaning
1EnglishobturationThe act of stopping up, or closing, an opening;...
2Latinobtūrātiōstopping up
3LatinobturoI stop up, block up; I assuage, allay
4Latinob-towards; against
5Latinobolusobolus (Greek coin)
6Ancient Greekὀβολόςobol, obolus, used at Athens as both a weight and...
7Ancient Greekὀβελόςa spit, rod; a horizontal line
8Ancient Greekβέλοςmissile, arrow, dart; weapon; something quickly...
9Proto-Indo-EuropeangʷélHos
10Proto-Indo-EuropeangʷelH-to throw, reach, pierce; to hit by throwing

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European gʷelH-Every word from Latin ob-Every word from Proto-Indo-European gʷélHos