Sharp, pointed; needle-like.
Late Middle English (in an earlier sense). From post-classical Latin acuatus, past participle of acuare acuate.
To make sharp, to sharpen.
Mid 16th century; earliest use found in Andrew Borde (c1490–1549), physician and author. From post-classical Latin acuat-, past participial stem of acuare to make pungent, to whet, sharpen from classical Latin acus needle; compare classical Latin acuere to sharpen.