General "appropriate":
* aptus: This word means "fit, suitable, appropriate." It is a general term for something being suitable for a particular purpose or situation.
* commodus: This word means "convenient, suitable, appropriate." It emphasizes the usefulness and practicality of something.
More specific meanings:
* idoneus: This word means "suitable, fit, proper." It is used for something that is qualified or adequate for a specific task.
* conveniens: This word means "fitting, suitable, appropriate." It implies something that is in harmony with or consistent with something else.
* decorus: This word means "appropriate, becoming, proper." It emphasizes the social and cultural appropriateness of something.
The best choice will depend on the specific context and the specific meaning you wish to convey.