Amplification involves repeating a word or expression while adding more detail to it, in order to emphasize what might otherwise be passed over. In other words, amplification allows you to call attention to, emphasize, and expand a word or idea to make sure the reader realizes its importance or centrality in the discussion.

• In my hunger after ten days of rigorous dieting I saw visions of ice cream--mountains of creamy, luscious ice cream, dripping with gooey syrup and calories.
• This orchard, this lovely, shady orchard, is the main reason I bought this property.
• . . . Even in Leonardo's time, there were certain obscure needs and patterns of the spirit, which could discover themselves only through less precise analogies--the analogies provided by stains on walls or the embers of a fire. --Kenneth Clark
• Pride--boundless pride--is the bane of civilization.
• He showed a rather simple taste, a taste for good art, good food, and good friends.

But amplification can overlap with or include a repetitive device like anaphora when the repeated word gains further definition or detail:

• The Lord also will be a refuge for the oppressed,/ A refuge in times of trouble. --Psalm 9:9 (KJV)

Notice the much greater effectiveness this repetition-plus detail form can have over a "straight" syntax. Compare each of these pairs:

• The utmost that we can threaten to one another is death, a death which, indeed, we may precipitate, but cannot retard, and from which, therefore, it cannot become a wise man to buy a reprieve at the expense of virtue, since he knows not how small a portion of time he can purchase, but knows that, whether short or long, it will be made less valuable by the remembrance of the price at which it has been obtained. --adapted from S. Johnson
• The utmost that we can threaten to one another is that death which, indeed, we may precipitate . . . .
• In everything remember the passing of time, a time which cannot be called again.
• In everything remember the passing of a time which cannot be called again.