-x: Eliminate or reduce cross-reference information (FWEAVE).

Cross-reference information (for FWEAVE) includes the Table of Contents ('c'), the Index ('i'), and the Module List ('m'). The option -x eliminates all of that information. The option -xletters eliminates the piece of information corresponding to each letter in the list. For example, -xim eliminates the Index and the Module List.

Another possibility is to say -xu, which prevents cross-references from unnamed sections (begun with @a or @A) from appearing in the Index.