Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
emphasize [ˈɛmfəsaɪz] vt подчёркивать (подчеркну́ть perf)
I must emphasize that ... я до́лжен подчеркну́ть, что ...
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: