Answer
The prefix "sym-" means "together", joined (or with). This affix appears in the term pubic symphysis.
Work Step by Step
Symphysis usually means a semi-movable cartilaginous joint like that between the two pelvic bones. The affix "sym' also appears in sympathetic, sympatholytic, and sympathomimetic. In these cases the combining form indicates some relation to the sympathetic nervous branch of the autonomic nervous system (ANS)