1733. Read that back to me! What do these characters have in common? 男 難 穴 維 尉

Answer:

They all have a reading that is the same backwards.

男  DAN, NAN, otoko - male, man

難  NAN, muzuka(shii), kata(i) - difficult

穴  KETSU, ana - hole, cave

維  I - tie, rope

尉  I - officer