Uncontrollable things can't be managed or influenced. An uncontrollable three-year-old can be a handful, while a politician with an uncontrollable desire for power can be dangerous.

If you fly off the handle at the smallest irritation, snapping angrily at the people around you, you have an uncontrollable temper. And when you and your best friend burst into giggles in the middle of chemistry class, it's uncontrollable laughter that's going to get you in trouble. When something is controllable, it can be restricted or restrained. Add the "not" prefix un-, and you've got something uncontrollable.

Definitions of uncontrollable
  1. adjective
    incapable of being controlled or managed
    uncontrollable children”
    synonyms: uncorrectable, unmanageable
    impervious to correction by punishment
  2. adjective
    of persons
    synonyms: indocile, ungovernable, unruly
    difficult, unmanageable
    hard to control
  3. adjective
    impossible to repress or control
    uncontrollable laughter”
    synonyms: irrepressible
    not being under control; out of control
  4. adjective
    difficult to solve or alleviate
    uncontrollable pain”
    synonyms: unmanageable
    not tractable; difficult to manage or mold
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