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

• mountain rice
• mountain rimu
• mountain rose
• mountain sandwort
• mountain sheep
• mountain sickness
• mountain skink
• mountain spinach
• mountain spleenwort
• Mountain Standard Time
• mountain starwort
• Mountain State
• mountain sumac
• mountain swamp gum
• mountain tea
• mountain tent
• Mountain Time
• mountain trail
• mountain viscacha
• mountain watercress
• mountain zebra
• mountaineer
• mountaineering
• mountainous
• mountainside