α. late Middle English ouer subtyl, late Middle English over subtyll, late Middle English–1500s ouer subtyll, 1500s ouer subtile, 1500s–1600s ouer subtill, 1600s ouer-subtile, 1600s over-subtil, 1600s over subtil, 1600s over-subtill, 1600s–1800s over subtile, 1600s–1800s over-subtile.
β. 1600s– oversubtle, 1600s– over-subtle, 1600s– over subtle, 1700s o'er subtle.