Where does “ὀστομάχιον” come from?

ὀστομάχιον (Ancient Greek) comes from Ancient Greek ὀστέον, from Ancient Greek κλάσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

Ancestry of “ὀστομάχιον”, step by step

ὀστομάχιον traces back through two separate lines of ancestry.

via Ancient Greek ὀστέον

StepLanguageWordMeaning
1Ancient Greekὀστέονbone; bones of the earth = rock; stone of fruit
2Ancient Greekκλάσιςbreaking, fracture; bending of the knee joint,...
3Ancient Greek-σῐς"suffix forming nouns"
4Ancient Greek-τιςretained after dentals
5Proto-Indo-European-tisDerives abstract/action nouns from verb roots

via Ancient Greek μάχη

StepLanguageWordMeaning
1Ancient Greekμάχηbattle, combat; quarrel, strife, dispute;...
2Ancient GreekμάχομαιI make war, fight, battle; I quarrel, wrangle,...
3Proto-Indo-EuropeanmaHgʰ-to fight
Every word from Proto-Indo-European -tisEvery word from Ancient Greek -σῐςEvery word from Ancient Greek κλάσις