1. Marked by firm determination or resolution; not shakable
   "unwavering loyalty"
   - firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable, unshakeable 
2. Not showing abrupt variations
   - level

See also: resolute, steady, unwaveringly

• Psittacidae
• Psittaciformes
• psittacosaur
• psittacosaurus
• psittacosis
• Psittacula
• Psittacula krameri
• Psittacus
• Psittacus erithacus
• psoas
• psocid
• Psocidae
• Psocoptera
• psocopterous insect
• Psophia
• Psophia crepitans
• Psophiidae
• Psophocarpus
• Psophocarpus tetragonolobus
• Psoralea
• Psoralea esculenta
• psoriasis
• psoriatic arthritis
• psst
• PST