To try to solve a problem a specific way; to undertake a task.
Used other than figuratively or idiomatically: see go, at.
To initiate an attack on or an argument with.
To specify by writing as a required procedure or ritual; to lay down authoritatively as a guide, direction, or rule of action.
To order (a drug or medical device) for use by a particular patient (under licensed authority).
To develop or assert a right; to make a claim (by prescription).