Answer:
See explanation!
Step-by-step explanation:
Confident is a term that is typically used to express that someone is sure in themselves, whether it may be in terms of appearance, knowledge, etc. For example, if someone sure that they passed a test, they may say, "I'm confident that I passed the test yesterday."
Now that you know what confident means, you can think of words that mean the opposite -- words that mean to be unsure of yourself, hesitant even. This can include the words doubtful, unsure, insecure, unassertive, etc. Just use whatever is best for your scenario!