What grade level vocabulary is the word insufficient?

The word "insufficient" is considered advanced vocabulary, typically introduced around 5th to 6th grade in English language learning.

Here's why:

* Complexity: "Insufficient" is a multi-syllabic word with a somewhat complex meaning. It implies a lack of something that is needed, requiring students to understand the concept of "sufficiency" first.

* Usage: While common in academic and formal settings, "insufficient" is less frequently used in everyday conversation.

While some younger students might encounter the word in context, it's likely they wouldn't fully grasp its meaning until around the 5th-6th grade level.