senza parola significa in inglese

impressed▼(strongly affected, especially favourably)
adjective
[UK: ɪm.ˈprest] [US: ˌɪm.ˈprest]

speechless▼(not speaking; not knowing what to say)
adjective
[UK: ˈspiːt.ʃləs] [US: ˈspiːt.ʃləs]