To remove an obstruction from something.

अवरोध हटाना

English Usage: I needed to unclog the sink after it was blocked for days.

Hindi Usage: मुझे कई दिनों तक अवरुद्ध रहने के बाद सिंक को अवरोध मुक्त करना पड़ा।

A state of being obstructed or blocked.

अवरुद्धता

English Usage: The unclogged drain allowed water to flow freely.

Hindi Usage: अवरुद्धता के बिना जल आसानी से बह गया।