Strong’s Greek
G1340 — diischurizomai
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
διϊσχυρίζομαι
diischurizomai — pronounced dee-is-khoo-rid'-zom-ahee
from 1223 and a derivative of 2478; to stout it through, i.e. asservate:--confidently (constantly) affirm. see GREEK for 1223 see GREEK for 2478
1 occurrence in the KJV.
Acts 12:15
And they said unto her, Thou art mad. But she constantly affirmed that it was even so. Then said they, It is his angel.