Which prefix means 'with; together; in association'?

• A. Con-
• B. Ultra-
• C. Contra-
• D. Retro-

Answer: (A)

The idea being tested is how prefixes convey relationship or togetherness. The prefix con- literally means with or together in Latin, and it appears in many words that describe joining or joint action. Think of connect (to bring together), conjunction (a joining or link), and consolidate (to make into a unified whole). In practice, con- often shifts to co- or com- for smoother pronunciation before certain sounds (cooperate, combine), but the underlying meaning remains “with” or “together.”

The other prefixes have different senses: ultra- signals extreme or beyond, contra- means against, and retro- means backward. So con- is the one that best fits the meaning “with; together; in association.”