Verb (5-dan, す, transitive)
1. to put to bed; to let sleep
よかったら絵本でも読んで寝かしてあげてくれないか？If you don't mind, could you read a picture book to them and put them to bed?
2. to lay (something) down; to put on its side
そのポスターの上に、黒くて長い傘が寝かされていた。A long black umbrella was lying on top of that poster.
3. to let (money, goods, etc.) lie idle; to set aside unused; to let (stock) lie unsold
お金を銀行に寝かしておくのはもったいない。It's a waste to let money sit idle in the bank.
4. to (let) ferment; to (let) age; to let (dough) rise; to lay down (wine)
このワインは十年寝かしてある。This wine has been aged for ten years.