Questions about example sentences with, and the definition and usage of "Steadfast"

A: Unmovable, holding steady (sort of like stubborn but not really)

Ex. Steadfast integrity which cannot be shaken, even if integrity causes suffering

A: If a person is steadfast, they will always be there for you. It also means loyal - your best friend is a very steadfast person. :)

A: Steadfast: Faithful, loyal, constant, staunch, resolute.

If someone is steadfast they are sure that what they are doing is right and they will not give it up.

Examples: "He was steadfast that they would win the baseball game." (Meaning, 'He was absolutely sure they would win the baseball game.'
"She was steadfast their relationship would last." (Meaning, 'There was no doubt their relationship would last.')

A: Steadfast can be thought of as steady or reliably doing something regardless of circumstances. Persistent means to not give up.

Examples:

She was steadfast in her efforts to train for the championship. She never missed a day even when she was very sick.

He was very persistent. Even though she said she wouldn't go with him, he kept asking her until she agreed to go.