sicuro di sé znamená v Angličtina

self-assured▼(confident on one's abilities)
adjective
[UK: ˌself ə.ˈʃʊəd] [US: ˌself ə.ˈʃʊəd]

self-confident▼(confident in one's abilities)
adjective
[UK: self ˈkɒn.fɪ.dənt] [US: ˈselfˈk.ɑːn.fə.dənt]