As there are plenty of nouns used as verbs, why is it that I do not shelf, but rather shelve, an idea? Since the -lves is just the special case plural of -lf, it seems curious that the -lve is used to construct the verb form.
I looked up some of the etymology, but it is of little use:
1591, "to overhang," back formation from shelves, plural of shelf. Meaning "put on a shelf" first recorded 1655; metaphoric sense of "lay aside, dismiss" is from 1812. Meaning "to slope gradually" (1614) is from M.E. shelven "to slope," from shelfe "grassy slope," related to shelf.
Is this an odd degredation of the word, or something else?