The story
- Latin · derived fromjustus
- Late Latin · derived fromjustificare“make just”
- Old French · derived fromjustifier
- Middle English · inherited fromjustifien
- English todayjustify
From Middle English justifien, from Old French justifier, from Late Latin justificare (“make just”), from Latin justus, iustus (“just”) + ficare (“make”), from facere, equivalent to just + -ify.
Etymology from Wiktionary, CC BY-SA 4.0.