What is the difference between "話します", "話す", "代弁する", "腹を割る"?

"話します" means "to speak, to talk (polite form)", "話す" means "to speak, to talk", "代弁する" means "speak for, represent", "腹を割る" means "to speak frankly".

Quadruple VS

Synonym Boundary: "話します", "話す", "代弁する", "腹を割る"

All represent the core concept "speak", but require precise selection.

Japanese Option A

話します

はなします (hanashimasu)

N5 / CEFR

Japanese Option B

話す

はなす (hanasu)

N5 / CEFR

Japanese Option C

代弁する

だいべんする (daibensuru)

C1 / CEFR

Japanese Option D

腹を割る

はらをわる (harawowaru)

C1 / CEFR

Quadruple VS Nuance Contrast & Social Differences

When expressing "speak" in Japanese, you must carefully distinguish between "話します", "話す", "代弁する", "腹を割る" based on context.

話します (はなします (hanashimasu) - Level: N5): Maps to "to speak, to talk (polite form)" and is used when Polite form of 話す.
話す (はなす (hanasu) - Level: N5): Maps to "to speak, to talk" and is used when Used for verbal communication. Polite form is 話します.
代弁する (だいべんする (daibensuru) - Level: C1): Maps to "speak for, represent" and is used when Essential structural term in CEFR C1 vocabulary syllabus..
腹を割る (はらをわる (harawowaru) - Level: C1): Maps to "to speak frankly" and is used when Essential structural term in CEFR C1 vocabulary syllabus..

Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!

Context for "話します"

友達と話します。

I talk with my friends.

Context for "話す"

友達と日本語を話します。

I speak Japanese with my friend.

Context for "代弁する"

私は代弁するに興味があります。

I am interested in speak for, represent.

Context for "腹を割る"

毎日、日本語を練習するために腹を割る。

Every day, I speak frankly to practice Japanese.

Synonym Mastery Challenge

Which Japanese word perfectly fits this blank space?

Fill in the blank: "友達と＿＿＿。" (Meaning: "I talk with my friends.")

🎉 Correct Answer!

Remember: "話します" is correct here because it represents "to speak, to talk (polite form)" in the context: "I talk with my friends.".