予よ約やく済ずみ

noun which may take the genitive case particle 'no', noun

reserved; booked; already taken

Indicates that a seat, room, ticket, or other resource has already been reserved and is not available. Often used in signs, online forms, or when checking availability.

• この席せきは予よ約やく済ずみです。

  This seat is reserved.

• ホテルの部屋へやはすべて予よ約やく済ずみだった。

  All the hotel rooms were already booked.