金曜日（きんようび、kinyoubi）
- friday

The word 金曜日, pronounced きんようび (kin'youbi), means "Friday" in Japanese. It's one of the days of the week.

⚫︎金曜日は、友達と映画を見に行きます。 Translation: I'm going to see a movie with my friends on Friday. ⚫︎ 来週の金曜日に、プレゼンテーションがあります。 Translation: I have a presentation next Friday.

You use 金曜日 to refer to the day of the week, Friday. It's used in everyday conversation, in schedules, and when making plans. It's typically used with particles like に (ni) which indicates "on" or "at", when talking about a specific event on that day. For example, 金曜日金曜日に (kin'youbi ni) means "on Friday".

⚫︎ 金曜日 is typically written with kanji 金 (kin, meaning gold or money), 曜 (you, meaning day of the week), and 日 (bi, meaning day). ⚫︎ The reading きんようび (kin'youbi) uses hiragana. ⚫︎ There are no other common ways to write this word. The okurigana is standard.

There aren't really synonyms for "Friday" in Japanese, because there's only one word. You could use phrases to convey the same meaning, such as "the day after Thursday" or "the fifth day of the week," but there is no direct synonym.

The antonyms are the other days of the week, such as 月曜日 (getsuyoubi - Monday), 火曜日 (kayoubi - Tuesday), 水曜日 (suiyoubi - Wednesday), 木曜日 (mokuyoubi - Thursday), 土曜日 (doyoubi - Saturday) and 日曜日 (nichiyoubi - Sunday).

今週の金曜日金曜日は、とても忙しいです。 ・Translation: This Friday will be very busy. ・Explanation: This sentence uses 今週 (konshuu - this week) to specify which Friday is being discussed. The particle は (wa) acts as the topic marker.

金曜日金曜日の夜に、パーティーがあります。 ・Translation: There is a party on Friday night. ・Explanation: This sentence uses the particle の (no), indicating possession or association, to show that the party is related to Friday.

⚫︎ 金 (kin) refers to the element "gold" and is also used to represent "Friday". It comes from the ancient Chinese system of naming days of the week after the five elements (wood, fire, earth, metal, water) and the sun and moon. ⚫︎ 曜 (you) means "day of the week" or "day" and is found in all the days of the week. ⚫︎ 日 (bi) also means "day" and is a suffix.