insecure, unsure
Estaría enamorado de mí y se sentiría inseguro.
He would be in love with me and would feel insecure.
— Rebeca (1940)
Nunca me he sentido inseguro en Australia.
I have never felt unsafe in Australia.
Tras el terremoto, el vecindario se sentía inseguro.
After the earthquake, the neighborhood felt unsafe.