Commentary Par XXIII 67

The word pareggio has caused difficulty.  Its other use in the poem ([Par XXI 90]) has not seemed problematic to the commentators (it is a verb form meaning 'I match' or 'I equal').  Here, on the other hand, where it is a predicate nominative, it has caused traffic jams.  The value of the word in its two most favored forms (there have been as many as seven candidates at one time or another) is close enough that one may say that the difference is not worth a large investment of effort: Some sense of a voyage over an extensive piece of sea is what most think is meant, however they arrive at their conclusion.  See C.Par.XXIII.67-69.