Earnest

1. (said of an action or an utterance) Serious or honest
2. (with a positive sense) Focused in the pursuit of an objective; eager to obtain or do.
3. Intent; focused; showing a lot of concentration.

4. (said of a person or a person's character) Possessing or characterised by seriousness.
5. Strenuous; diligent.
6. Serious; weighty; of a serious, weighty, or important nature; important.