What grade level is the word hai?

The word hai is typically considered a 9th Grade (Freshman) level word in the US education system.

How common is the word hai?

In terms of usage frequency, hai is classified as a Rare word.

What is the CEFR level for hai?

hai has a Common European Framework of Reference (CEFR) level of C1.

Is hai a Tier 1, Tier 2, or Tier 3 vocabulary word?

It is classified as a tier 3 word, meaning it is a highly specialized, subject-specific term primarily used in particular domains.

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Definition of hai

hai

/haɪ/

hai

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hai Lexical Profile

CEFR

Grade

Tier

Usage

Rare

• interjection

An expression of affirmation, agreement, or acknowledgment, traditionally used in Japanese cultural contexts.

Example

"The student bowed slightly and replied, 'Hai, Sensei,' before returning to his place on the mat."

A sharp, vocalized shout used during martial arts practice to project energy, focus breathing, or accompany a striking technique.

Example

"She delivered a swift front kick accompanied by a fierce 'hai!' that echoed throughout the quiet dojo."

Synonyms

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Antonyms

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• Rhymes for hai

• Nearby Words

hai

Word Origin & Etymology

Borrowed directly from the Japanese word はい (hai), meaning 'yes' or 'understood'. It also appears as a phonetic representation of a martial arts shout (kiai).

Usage Trend

Historical frequency of usage in published text.

180019102020

Data source: Google Books Ngram Viewer

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Wordmom. (2026). Definition of Hai. In Wordmom Dictionary. Retrieved Oct 16, 2026, from https://wordmom.com/dictionary/hai