To conduct (oneself) well, or in a given way.
To act in a polite or proper way.
To act, conduct oneself in a specific manner; used with an adverbial of manner.
To follow or obey the custom, practice, or rules (especially of a religion).
To take note of and celebrate (a holiday or similar occurrence); to follow (a type of time or calendar reckoning).
To notice or view, especially carefully or with attention to detail.
To comment on something; to make an observation.