Unsteadiness is the quality of being wobbly, shaky, or unreliable. When you stand on one foot, you might feel the unsteadiness in your balance as your body sways back and forth. A table with uneven legs has an unsteadiness that makes glasses tip over. A ladder leaning at the wrong angle creates a dangerous unsteadiness that could lead to a fall.

The word can describe physical shakiness, like the unsteadiness in your hands when you're nervous before giving a presentation, or the unsteadiness of a stack of books piled too high. But it also describes situations or patterns that lack stability. A friendship marked by unsteadiness might be strong one week and cold the next, leaving you unsure where you stand. An economy experiencing unsteadiness fluctuates unpredictably, making it hard for people to plan ahead.

Unsteadiness can signal something that needs attention or adjustment. When a bike wheel shows unsteadiness as it spins, it probably needs to be straightened. When your work habits show unsteadiness, finishing assignments some weeks but forgetting them others, you might need to develop better routines. The opposite of unsteadiness is steadiness: that reliable, solid quality that lets you trust something to stay balanced and consistent.