The head of a school (noun)

The students were called to the office to meet the ___.

Surely; without a doubt (adverb)

You can ___ count on me to help with the project. I’ll be there for sure!

Excellent; of high quality (adjective)

The chef prepared a ___ meal. It was expensive, but it worth it.

To officially make known (verb)

The teacher will ___ the winners during the meeting and post it online too.

Feeling pleased and satisfied over something owned, made, or done (adjective)

He felt ___ of his hard work.