WordReference Random House Learner's Dictionary of American English © 2026
-thes-, root.
- -thes- comes from Greek, where it has the meaning "put together;
set down.'' This meaning is found in such words as: antithesis, hypothesis, parenthesis, photosynthesis, prosthesis, synthesis, synthetic, thesis.
'-thes-' also found in these entries (note: many are not synonyms or translations):