Complex sentence: The people of ancient Tamilakam engaged in brisk overseas trade with Rome; the trade reached a peak after the discovery of a direct route between Tamilakam and Egypt, utilising the monsoon winds.
Split into simpler sentences: The people of ancient Tamilakam engaged in brisk overseas trade with the Romans. Trade with Rome reached a peak after the discovery of a direct route between Tamilakam and Egypt, utilising the monsoon winds.