The longest word in the english dictionary is the famous disease casued by the inhalation of volcanic ashes, silica, etc.:
Pneumonoultramicroscopicsilicovolcanoconiosis
And the longest word in any language, doesn't belong to any specific language, because it's a scientific name. This is the scientific name of titin. This word, has amazingly 189,819 letters.
Mama's decision to give quilts to Maggie has a development on the plot by creating the rising action. Mama can see that Maggie really wants and deserves the quilts. Hope that helps you