Which of the following is most likely the root word of transatlantic? a. trans c. altitude b. crossing d. atlas

the root word of transatlantic is a) trans

Trans is a prefix combined with any other words. Trans means "across", "crossing", "on the other side of".

Transatlantic ⇒ trans - Atlantic

meaning "across the Atlantic", "crossing the Atlantic", "on the other side of the Atlantic".