To get involved in; to investigate or explore.
To divide, to be a factor of.
To attack; to assault physically.
Used other than figuratively or idiomatically: see go, into.
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).