The story
- Latin · derived fromgradus
- Latin · derived frompronus“bent over”
- English todaypronograde
From Latin pronus (“bent over”) + -grade (“means of walking”) (from Latin gradus). Compare prone.
Words from the same roots
Latinpronus all →
prone
Latingradus all →
degreegradegradual-gradeunguligrade
Etymology from Wiktionary, CC BY-SA 4.0.