Help the frustrated traveler explain why the road trip packing is failing.

We can't fit the giant inflatable flamingo in the trunk because there just isn't enough _____!

The correct answer is room.

Some nouns can be both countable and uncountable depending on their meaning. When room means "empty physical space," it is an uncountable noun and cannot be pluralized or take the article "a".

When it means "a part of a building" (like a bedroom or kitchen), it is a countable noun (e.g., "Our house has four rooms").