🦅 Project Eagle
Quadruple VS

Synonym Boundary: "曜日", "明後日", "一昨日", "日増しに"

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

Japanese Option A

曜日

ようび (youbi)
N5 / CEFR
Japanese Option B

明後日

あさって (asatte)
N5 / CEFR
Japanese Option C

一昨日

おととい (ototoi)
N4 / CEFR
Japanese Option D

日増しに

ひましに (himashini)
N2 / CEFR

Quadruple VS Nuance Contrast & Social Differences

When expressing "day" in Japanese, you must carefully distinguish between "曜日", "明後日", "一昨日", "日増しに" based on context.
  • 曜日 (ようび (youbi) - Level: N5): Maps to "day of the week" and is used when Used to ask or state which day of the week it is.
  • 明後日 (あさって (asatte) - Level: N5): Maps to "the day after tomorrow" and is used when Refers to two days after today. This is the common form for 'the day after tomorrow' in both spoken and written Japanese..
  • 一昨日 (おととい (ototoi) - Level: N4): Maps to "the day before yesterday" and is used when Refers to the day two days ago. Used for recent past events. Sometimes pronounced 'issakujitsu' in more formal contexts, but 'ototoi' is common for N4..
  • 日増しに (ひましに (himashini) - Level: N2): Maps to "day by day; increasingly" and is used when Indicates that something is gradually increasing or progressing with each passing day..
Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!
Context for "曜日"
今日は何曜日ですか。
What day of the week is it today?
Context for "明後日"
明後日、大阪へ出張に行きます。
I will go on a business trip to Osaka the day after tomorrow.
Context for "一昨日"
一昨日、図書館で本を借りました。
I borrowed a book from the library the day before yesterday.
Context for "日増しに"
秋が深まるにつれて、日増しに寒さが増してきた。
As autumn deepened, the cold increased day by day.

Synonym Mastery Challenge

Which Japanese word perfectly fits this blank space?

Fill in the blank: "今日は何 ___ ですか。" (Meaning: "What day of the week is it today?")
🎉 Correct Answer!

Remember: "曜日" is correct here because it represents "day of the week" in the context: "What day of the week is it today?".

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