Antonyms for the phrase "were confounded" could include "were certain," "were clear," "were composed," "were confident," "were convinced," "were enlightened," "were assured," "were satisfied," "were clear-headed" and "were untroubled." These words all imply a sense of clarity and certainty, rather than confusion or bewilderment. When we are confounded, we feel uncertain or perplexed, but these antonyms suggest a more stable and grounded state of mind. Using a range of vocabulary to describe different mental states can help us better express ourselves and communicate our thoughts and feelings.