πετάννυμι (petannumi)

to spread out sails or clothes, (Odyssey by Homer); χεῖρε πετάσσας, of one swimming, (Odyssey by Homer): metaphorically, θυμὸν πετάσαι to open one's heart, (Odyssey by Homer):—;Pass., mostly in perfect, to be spread on all sides , (Homer): participle spread wide, opened wide , of folding doors, πύλαι πεπταμέναι (Iliad by Homer); πετάσθησαν (Odyssey by Homer) (ML)