Portuguese word antigravitacional comes from Portuguese gravitacional ((physics) gravitational (pertaining to gravitation).), Portuguese anti- (Anti-.).

Antigravitacional etymology ^?

Antigravitacional detailed word origin explanation

Dictionary entry	Language	Definition
gravitacional	Portuguese (por)	(physics) gravitational (pertaining to gravitation).
anti-	Portuguese (por)	Anti-.
antigravitacional	Portuguese (por)	(physics) antigravitational (acting against gravity).