Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
preface [ˈprɛfəs] n (in book) предисло́вие
vt
to preface sth withпредпосыла́ть (предпосла́ть*perf) чему́-н +acc
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: