Related Clues:

• Irregular in motion or habit
• Irregular in habit or movement
• Liable to sudden unpredictable change
• Unpredictable, temperamental
• Liable to change rapidly and unpredictably
• Hard to be not so steady?
• What the adder might do, perhaps, in an unsteady way
• Little by little he is about to be a pest, but not a regular one
• Not even this will do wrong with a twitch
• Not the regular thing to do wrong with a twitch
• Er lumber room sounds not a regular place
• At risk of capsizing
• Unstable enough to make a mistake at one hundred
• None too sturdy
• Funny oval Scrabble piece that's changeable