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 stop oneself from some action or interference; to abstain.
To abstain from (food or drink).
The chorus or burden of a song repeated at the end of each verse or stanza.
A much repeated comment, complaint, or saying.