Which prefix means Together?

• A. Syn-
• B. Per-
• C. Bio-
• D. Sub-

Answer: (A)

The idea being tested is recognizing a prefix that expresses the sense of togetherness. The prefix that means together is syn-, coming from Greek syn, meaning with or joined.

This prefixed form appears in words like synthesis (putting parts together), synchronize (to do things at the same time), and symbiotic (organisms living together in a close relationship). That clear sense of "together" is why syn- is the best fit here.

Other prefixes don’t convey that meaning: per- means through or thoroughly, bio- means life, and sub- means under or below. So syn- is the appropriate choice for “together.” If you see it before certain consonants like p, b, or m, it can appear as sym- (as in symmetry), but the underlying idea remains “together.”