1. Not brought about by coercion or force
   - uncoerced, willing 
2. Not resulting from undue effort; not forced
   "a voice with a pleasingly unforced quality"
   - unstrained

See also: effortless, voluntary

• water gillyflower
• water glass
• water gum
• water gun
• water hammer
• water hazard
• water heater
• water hemlock
• water hen
• water hickory
• water hole
• water horehound
• water horsetail
• water hyacinth
• water ice
• water jacket
• water jug
• water jump
• water lemon
• water lettuce
• water level
• water lily
• water lobelia
• water locust
• water main