Uncontrollable means impossible to hold in check. Uncontrollable laughter, an uncontrollable urge, uncontrollable shaking.
It belongs to the body and the emotions more than to machines, since uncontrollable laughter and uncontrollable crying are both things that happen to a person rather than by them. Of a fire it means past any hope of containing.
1adjectiveuncontrollableImpossible to hold in check.
“She burst into uncontrollable tears when she heard the news.”
uncontrollable is a quality.
From un- + controllable.
Etymology from Wiktionary, CC BY-SA