Add a suffix to the word secured?

Here are some suffixes you can add to "secured" to change its meaning:

-ly: securely (adverb, meaning in a safe or protected way)

-ness: securedness (noun, meaning the state of being safe or protected)

-ity: security (noun, meaning the state of being safe or protected)

-ation: (not typically used with "secured")

The most common and useful suffix to add to "secured" is -ly to create the adverb securely.