Ryu

Japanese: 留 - リュウ

[Sound] Ryu (Ryu) (Kan) Ru (Go) [Reading] To stop, to stop, to stay, Louvre [Kanji to learn] 5th grade〈Ryu〉
1. To keep in a place. Not to move from that position. To remain. Stay Touryu -Retention/Detention"
2 (Substitute for "reserve") The evaporated matter is cooled to separate and refine the components. "Dry distillation, distillation, fractional distillation"
〈ru〉 To stay. Absent Room "
[Name] Tane, To, Tome, Hisa [Difficult to read] playing cards Karuta

Ryu (Ryu) [Ryu] [Ryu]

The moment when a planet appears to pause when it goes from direct to retrograde motion or vice versa. Also, the time and position at which this happens.

Ruble (Russian: ruble' / English: ruble)

The currency of the Russian Federation. 1 ruble is made up of 100 kopecks.
[Additional information] It can also be written as "tsumu."

Source: About Shogakukan Digital Daijisen Information | Legend

Japanese:

［音］リュウ（リウ）（漢）　ル（呉）　［訓］とめる　とまる　とどめる　とどまる　ルーブル
［学習漢字］5年
〈リュウ〉
１その場所にとめておく。その位置から動かない。とどまる。「留置・留任／遺留・慰留・寄留・拘留・在留・残留・滞留・駐留・停留・逗留とうりゅう・保留・抑留」
２（「溜」の代用字）蒸発分を冷却して成分を分離・精製する。「乾留・蒸留・分留」
〈ル〉とどまる。「留守るす」
［名のり］たね・と・とめ・ひさ
［難読］歌留多カルタ