The story
- German · derived fromselbstsicher“selfsecure, self-assured, self-confident”
- English todayselfsecure
From self- + secure, probably a calque of German selbstsicher (“selfsecure, self-assured, self-confident”). Compare also Dutch zelfzeker, zelfverzekerd (“selfsecure, confident”).
Etymology from Wiktionary, CC BY-SA 4.0.