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.
To struggle in opposition; to be in contention or dispute; to contend; to contest.
To try to achieve a result; to make strenuous effort; to try earnestly and persistently.
To vie; to compete as a rival.