An Etymological Dictionary of Astronomy and Astrophysics

The combining of the constituent elements of separate materials or abstract entities into a single or unified entity; opposite of → analysis.
→ aperture synthesis; → nucleosynthesis.
Chemistry: The forming or building of a more complex substance or compound from elements or simpler compounds.
Philo.: The combination or reconciliation of opposed notions.

Etymology (EN): From L. synthesis “collection, set,” from Gk. synthesis “composition,” from syntithenai “put together, combine,” from → syn- “together” + tithenai “to put, place,” from PIE base *dhe- “to put, to do,” cf. Pers. dâdan “to give,” as below.

Etymology (PE): Handâyeš, from han-, variant ham- “together,” → syn- + O.Pers./Av. dā- “to give, grant, put,” dadāiti “he gives;” Mid.Pers./Mod.Pers. dâdan “to give, put”
(cf. Skt. dadáti “he gives;” Gk. tithenai “to place, put, set,” didomi “I give;”
L. dare “to give, offer;” Rus. delat’ “to do;” O.H.G. tuon, Ger. tun, O.E. don “to do;” PIE base *dhe- “to put, to do”)

• -y- epenthetic vowel
• -eš verbal noun suffix, → synthesize.