ACUTE, ACUTELY, ACUTENESS
ADJECTIVES
1785 — PARLISH → PARLOUS acute, clever, shrewd; bold, dashing → Eng. dial.
1966 — FILTHY extreme, acute → Amer. dial.
ADVERBS
1400 — SUBTILELY with acuteness or perspicacity → obs.
NOUNS
1386 — SUBTILTY acuteness; penetration; perspicacity → obs.
1388 — SUBTILITY acuteness, perspicacity, subtlety