A calligram is a poem in which the calligraphy, the formation of the letters or the font selected, represents an aspect of the poem’s subject, as in: thin (written in a very thin font), ancient (looking crumbling and old) or growth (with each letter written in a progressively larger font size). A poem about fear might be written in shaky letters to represent trembling. This font choice supports the reading of the poem by emphasising the meaning of particular words.