Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
shorten [ˈʃɔːtn] vt (clothes) укора́чивать (укороти́ть*perf) (visit) сокраща́ть (сократи́ть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: