This phrase refers to Satan's fear of what his comrades will think if he repents. This dilemma is understandable because none of us would want to look foolish among our peers. It is especially difficult for Satan because he has led the other angels and
would look cowardly if he admitted he was wrong. The
alliteration of "disdain" and "dread" is significant as well. Disdain means to completely hate something or someone, but dread means to fear something. Satan hates God's punishment but he fears what the other angels will think if he repents.
Shame is an ironic term because in biblical terms it relates to the
fall of Adam and Eve. The first mention of shame comes after the fall when
both are naked. Before this they walk through Eden without thought of their
nakedness. In a way, Satan is naked. He wants to turn to God but he owes
allegiance to the other angels.