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

Sounds like: few, phew, feu

• nitrosobacteria
• Nitrosomonas
• Nitrospan
• Nitrostat
• nitrous
• nitrous acid
• nitrous bacteria
• nitrous bacterium
• nitrous oxide
• nitta tree
• nitty
• nitty-gritty
• nitweed
• nitwit
• nitwitted
• NIV
• niveous
• Nivose
• nix
• nixie
• Nixon
• Nizhni Novgorod
• Nizhnyi Novgorod
• NJ
• Njord