Based on my research, I have several options (all of them come with problem).

  • Stable (I don't want to have 'resist to change' meaning)
  • Firm (I don't want to have 'resist to change' & 'standing still' meaning)
  • Steady (I don't want to have 'standing still' meaning)

I want to describe something that moves, but not easy to fall/stop by outside stimulus.


5 Answers 5


Perhaps a two-word phrase that aptly modifies "stability" and captures the concept succinctly i.e., DYNAMIC STABILITY

Q: What is the definition of dynamic stability in human movement? We say a state is stable, what then is dynamic stability?

A: Equilibrium means moving without acceleration. Balance is the control of equilibrium. Stability is the resistance to perturbation.

dynamic stability

Link to article: Assessing the stability of human locomotion: a review of current measures

  • Thanks for your input. It's accurate for academic purpose. But my purpose is on product branding. So I need the one word version. So, sorry, not yet an answer... :) Actually, I need some single words that would define the word "Agile". I already have 'Fast' & 'Flexible' in hand. I believe it still need to describe 'the uneasiness to fall' ('fast' and 'flexible' already describe the movement). Feb 18, 2015 at 4:47
  • "Back to the drawing board" as they say. If you would edit these additional factors into your OP it will help others to provide you with good suggestions.
    – user98990
    Feb 18, 2015 at 4:54
  • And what is the product?
    – user98990
    Feb 18, 2015 at 4:55

Infallible is metaphorical, but it may suit the purpose.


Stable is indeed an appropriate word for something that won't fall over. However, if you want to convey a stronger sense of motion, you could say

  • self-stabilizing
  • self-balancing
  • self-righting

For example, self-stabilizing unicycles, self-balancing scooters, and self-righting cups exist.


Steady is just fine, as it doesn't necessarily imply standing still. Something can move steadily.


The best I can think of is resilient

From Merriam-Webster:

a : capable of withstanding shock without permanent deformation or rupture

b : tending to recover from or adjust easily to misfortune or change

It is a word with very positive connotations, being used to describe a return to good health:

"The local economy is remarkably resilient."

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