1. difficult to solve or alleviate

- uncontrollable pain

Similar word(s): intractable, unmanageable

2. incapable of being controlled

Similar word(s): difficult, unmanageable, indocile, ungovernable, unruly

3. incapable of being controlled or managed

- uncontrollable children

Similar word(s): incorrigible, uncorrectable, unmanageable

4. impossible to repress or control

- uncontrollable laughter

Similar word(s): uncontrolled, irrepressible

Sentences with uncontrollable as an adjective:

- She got the uncontrollable urge for some chocolate.