fantasma
/fanˈtasma/ · A2 · noun · m
ghost
👻 fantasma = phantasm: same Greek root as phantom and fantasy
From Greek phantasma, an apparition, from phainein, to show. English phantom and phantasm are the same word. The show root also explains the slang sense: a fantasma is a show-off, all appearance and no substance. Masculine despite the -a: el fantasma.