Dictionary.com
definitions

willable

[wil-uh-buh l]
adjective
  1. capable of being willed or fixed by will.

Origin of willable

late Middle English word dating back to 1400–50; see origin at will2, -able
Related formsun·will·a·ble, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for willable

willable

adjective
  1. able to be wished or determined by the will
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012