to concentrate ...1647 obs.
from concentric (adj.) + -ate;
possibly an alteration of concentrate (vb.)
FIRST DOCUMENTED USE
1647 - see EXAMPLE below
"...Here you have a time prefixed, and must of necessity concentricate your self and your best resolution; elsewhere Nature is unwilling to find a Suspension, abhorring its own Destruction..."
From: An Impartial Account of the Arraignment Trial & Condemnation of Thomas late Earl of Strafford, and Lord Lievtanant of Ireland before the Parliament at Wesminster, Anno Dom, 1641
In A Letter to a Friend
- Thomas Wen