sympus

from The Century Dictionary.

• noun In teratology, a monster with the lower extremities more or less united.
• noun syn-. [In earlier E. use also sin-; = French syn-, OF. syn-, sin- = Sp. sin- = Pg. syn-, sin- = It. sin, ⟨ L. syn-, ⟨ Gr. συν-, ξυν-, a prefix, ⟨ σύν, Attic ξύν, prep., with, along or together with, beside, attended with: see com-.] A prefix of Greek origin, corresponding to the Latin prefix con-, and signifying ‘with, together, along with,’ etc. Before certain consonants the n is assimilated, making syl-, sym-, sys-, and sometimes it is dropped.