知れる

What does 知れる mean in English?

1. to become known; to come to light; to be discovered(v1, vi)
2. to be known; to be understood(v1, vi)
3. to obviously not amount to much; to seem trivial(v1, vi)
4. to be evident; to be obvious; to go without saying(v1, vi)
5. to be very intense (worry, hope, etc.); to be extremely severe(v1, vi)