belabor (verb) - to attack verbally; to explain or go over repeatedly or more than necessary [bih-ley-ber]
BREAKDOWN: BE- (to make) + LABOR- (work)
the common idiom belabor the point means to spend too much time on one item of discussion
“So let us begin anew -- remembering on both sides that civility is not a sign of weakness, and sincerity is always subject to proof. Let us never negotiate out of fear, but let us never fear to negotiate. Let both sides explore what problems unite us instead of belaboring those problems which divide us.” —John F. Kennedy