syn-

a prefix occurring in loanwords from Greek, having the same function as co- (synthesis; synoptic); used, with the meaning “with,” “together,” in the formation of compound words (synsepalous) or “synthetic” in such compounds (syngas).

Also, sy-, syl-, sym-, sys-.

Origin:
< Greek, combining form representing sýn with, together with

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To syn-

Collins

World English Dictionary

syn-

—*prefix*
1.	with or together: synecology
2.	fusion: syngamy

[from Greek sun together, with]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10

Syn- is always a great word to know.

So is bezoar. Does it mean:

a stew of meat, vegetables, potatoes, etc.

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

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Etymonline

Word Origin & History

syn-

prefix meaning "together with," from Gk. syn "with, together with," of unknown origin.

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

syn- or sym-
pref.

Together; with: synclonus.
United: syncephaly.
Same; similar: synteny.
At the same time: synesthesia.

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synarthrosis synastry synchronous syncope syncretize syncrisis