labor/belabor the point

:  expenditure of physical or mental effort especially when difficult or compulsory

:  human activity that provides the goods or services in an economy

:  the services performed by workers for wages as distinguished from those rendered by entrepreneurs for profits

:  to exert one's powers of body or mind especially with painful or strenuous effort :  work

:  to move with great effort

:  to be in the labor of giving birth

:  of or relating to labor

:  of, relating to, or constituting a political party held to represent the interests of workers or made up largely of organized labor groups

:  to attack verbally

:  to beat soundly

:  to explain or insist on excessively

:  an individual detail :  item

:  a distinguishing detail

:  the most important essential in a discussion or matter

:  to furnish with a point :  sharpen

:  to give added force, emphasis, or piquancy to

:  to scratch out the old mortar from the joints of (something, such as a brick wall) and fill in with new material