Verse 4

पञ्चमं स्कन्दमातेति षष्ठं कात्यायनीति च। सप्तमं कालरात्रीति महागौरीति चाष्टमम्॥

pañcamaṁ skandamātēti ṣaṣṭhaṁ kātyāyanīti ca। saptamaṁ kālarātrīti mahāgaurīti cāṣṭamam॥

Translation

The fifth is called Skandamātā, the sixth is Kātyāyanī, the seventh is called Kālarātrī, and the eighth is called Mahāgaurī.

Word by word

pañcamaṁ
fifth
skandamātā
Skandamātā (mother of Skanda)
iti
thus
ṣaṣṭhaṁ
sixth
kātyāyanī
Kātyāyanī (daughter of sage Katyayana)
ca
and
saptamaṁ
seventh
kālarātrī
Kālarātrī (dark night)
mahāgaurī
Mahāgaurī (great fair one)
cāṣṭamam
and eighth

Meaning

This fourth core verse continues the enumeration of the Navadurgā, listing the fifth through eighth forms: Skandamātā, Kātyāyanī, Kālarātrī, and Mahāgaurī.