1. Without variation or change, in every case
   "constantly kind and gracious"
   - invariably, always 
2. Without interruption
   "the world is constantly changing"
   - always, forever, perpetually, incessantly, unremittingly

See also: constant

• Spinoza
• spinster
• spinsterhood
• spinthariscope
• spinule
• Spinus
• Spinus pinus
• Spinus tristis
• spiny
• spiny anteater
• spiny dogfish
• spiny lizard
• spiny lobster
• spiny puffer
• spiny softshell
• spiny talinum
• spiny-backed
• spiny-edged
• spiny-finned
• spiny-finned fish
• spiny-headed worm
• spiny-leafed
• spiny-leaved
• spiny-stemmed
• SPipistrellus hesperus