1. Of an organism's environment; least favourable for survival
   - pessimal

See also: worst

• nonspeaking
• nonspecific
• nonspecific urethritis
• nonspecifically
• nonspherical
• nonstandard
• nonstarter
• nonsteroid
• nonsteroidal
• nonsteroidal anti-inflammatory
• nonsteroidal anti-inflammatory drug
• nonstick
• nonstop
• nonstop flight
• nonstructural
• nonsubjective
• nonsubmergible
• nonsubmersible
• nonsuch
• nonsuit
• nonsuppurative
• nonsurgical
• nonsweet
• nonsyllabic
• nonsymbiotic