YOU SAID:
this man is so insecure
INTO JAPANESE
この男はとても不安だ
BACK INTO ENGLISH
this man is very anxious
INTO JAPANESE
この人はとても心配している
BACK INTO ENGLISH
this person is very worried
INTO JAPANESE
この人はとても心配している
BACK INTO ENGLISH
this person is very worried
That didn't even make that much sense in English.