aah
I
 /ˈɑː/  interj  
  — used to express pleasure, surprise, or happiness
   Aah, that feels good.
————————
II
  verb  , aahs, aahed, aahing [  no obj  ]
   informal   : to express amazement, joy, or surprise
  — used in the phrase ooh and aah
   We all oohed and aahed at/over the fireworks.
  aah  noun  ,  pl   aahs [  count  ]
   the oohs and aahs of the crowd