Where does “geosynthetic” come from?

geosynthetic (English) comes from English synthetic, from French synthétique, from Ancient Greek συνθετικός, from Ancient Greek σύνθεσις, from Ancient Greek συντίθημι, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

geosynthetic (English): Any synthetic, typically polymeric product used...

Definitions

Any synthetic, typically polymeric product used...

Ancestry of “geosynthetic”, step by step

geosynthetic traces back through two separate lines of ancestry.

via English synthetic

Step	Language	Word	Meaning
1	English	synthetic	Of, or relating to synthesis; Produced by...
2	French	synthétique	synthetic
3	Ancient Greek	συνθετικός	skilled in putting together, constructive;...
4	Ancient Greek	σύνθεσις	a putting together, composition, combination,...
5	Ancient Greek	συντίθημι	to assemble, put together
6	Ancient Greek	σῠν-	together; with, together
7	Ancient Greek	σύν	beside, with
8	Proto-Hellenic	*ksún	beside, with

via English geo

Step	Language	Word	Meaning
1	English	geo	An inlet, gully or cleft in the face of a cliff
2	English	geo-	Earth; geography
3	Ancient Greek	γεω-	earth; earth-
4	Latin	-logia	-logy; the study of
5	Ancient Greek	-λογία	Base for nouns denoting the study of something,...
6	Ancient Greek	λόγος	That which is said: word, sentence, speech,...
7	Ancient Greek	λέγω	I put in order, arrange, gather; I choose, count,...
8	Proto-Indo-European	leǵ-	to gather, collect, with derivatives meaning to...

Every word from Proto-Hellenic *ksún →Every word from Ancient Greek σῠν- →Every word from Ancient Greek συντίθημι →