1
Stage 1 of 3
pronus
Latin · ancient
"leaning forward"
possibly related to 'pro', forward
2
Stage 2 of 3
prone
Old French · medieval
"lying face down"
in English it first meant naturally inclined, around 1400; the sense 'face down' only appears in the 1570s
3
Stage 3 of 3
prone
English · 1300s
"lying face down"
'accident-prone' dates from the 1920s
Drag to pan · scroll to zoom