To encounter; to experience.
To contact or touch (something).
To have a meeting with (someone).
To strike (something).
To answer (something) with; to respond to (something) with.
To notice or view, especially carefully or with attention to detail.
To take note of and celebrate (a holiday or similar occurrence); to follow (a type of time or calendar reckoning).
To comment on something; to make an observation.
To follow or obey the custom, practice, or rules (especially of a religion).