1. Sound like a half-formed whistle expressing astonishment, scorn, or dislike 
2. Expresses relief or tiredness
   - phew

Sounds like: few, phew, feu

• bony
• bony fish
• bony labyrinth
• bony-plated
• bonyness
• bonze
• bonzer
• boo
• boo-boo
• boob
• boob tube
• booboisie
• booby
• booby hatch
• booby prize
• booby-trap
• Boocercus eurycerus
• boodle
• boofhead
• booger
• boogeyman
• boogie
• boogie-woogie
• boohoo
• boojum