The story
- Latin · derived fromprō-“forward direction, forward movement”
- Anglo-Norman · derived frompur-
- Middle English · inherited frompur-
- English todaypur-
From Middle English pur-, from Anglo-Norman pur- (compare modern French pour), from Latin prō- (“forward direction, forward movement”). Doublet of pro-.
Words from the same roots
Latinprō- all →
purchasepurposepro-purflepurlieu
Etymology from Wiktionary, CC BY-SA 4.0.