IPA: /ˌʌn.kənˈtroʊ.ə.bəl/
KK: /ʌnˌkɒntrəˈloʊəbl/
Something that cannot be managed or restrained, often referring to strong emotions or behaviors that are difficult to keep in check.
His uncontrollable laughter filled the room with joy.
Uncontrollable → It is formed from "un-" (meaning not), "control" (from Latin "contrarotulare", meaning to check or regulate), and "-able" (meaning capable of). The word "uncontrollable" means not capable of being checked or regulated, indicating something that cannot be controlled.
Think of 'not' ('un-') being able to 'check' or 'regulate' ('control') something — that's why uncontrollable means something that cannot be controlled.