unwavering

Adjective

• not showing abrupt variations
  • spoke in a level voice
    
  • she gave him a level look- Louis Auchincloss
    

• marked by firm determination or resolution; not shakable
  • firm convictions
    
  • a firm mouth
    
  • steadfast resolve
    
  • a man of unbendable perseverence
    
  • unwavering loyalty
    

Related words

• Synonyms: 
  level , firm , steadfast , steady , stiff , unbendable , unfaltering , unshakable