The story
- Latin · derived fromacuō“sharpen”
- Medieval Latin · derived fromacuitas
- Middle French · derived fromacuité
- Middle English · inherited fromacuite
- English todayacuity
From Middle English acuite, acuyte, from Middle French acuité, from Medieval Latin acuitas, irreg., from Latin acuō (“sharpen”).
Etymology from Wiktionary, CC BY-SA 4.0.