Japanese edit

For pronunciation and definitions of がったい – see the following entry.
合体
[noun] combination of multiple entities to become one
[noun] union
[noun] (science fiction, of robots) combining together and becoming a new, stronger robot
[noun] (euphemistic) sex
[verb] (of multiple entities) to combine and become one
[verb] to unite, to coalesce
[verb] (science fiction, of robots) to combine together and become a new, stronger robot
[verb] (euphemistic) to have sex
(This term, がったい, is the hiragana spelling of the above term.)