negation or denial of something

कुछ का नकारना

English Usage: She did not quite understand the instructions.

Hindi Usage: उसे निर्देश ठीक से समझ में नहीं आए।

to a certain extent or degree

कुछ हद तक

English Usage: The event was not quite as successful as expected.

Hindi Usage: यह कार्यक्रम अपेक्षा से कुछ हद तक सफल नहीं था।