labyrinth

tailwheel

billionaire

first class (a status, section, etc. of premier rank)

business class

(aviation) economy class

尾閭: a hole that is said to be located at the bottom of the ocean where all water is endlessly leaking away without ever being exhausted.

尾閭骨: coccyx, tailbone

一打: a (single) stroke, blow / 一朶: a (single) branch of flowers; a (single) cloud / 一駄: an amount equivalent to the carrying capability of one horse

市場: (town) market