Someone that is insecure in their English abilities is very unlikely to participate in a spelling bee, due to their lack of faith in themselves.

Someone who is insecure in their ability to make friends will likely have trouble taking the initiative in speaking to strangers.

I am generally considered to be an insecure individual, being too shy to really give speeches or presentations in class.

Someone that is insecure about something is more likely to be nervous about it because they don’t have personal confidence.

If you are feeling insecure, it pays to remember that everyone has strengths and weaknesses and no one can be good at everything.