1. Voluntary; spontaneous.

2. The power of directing one's own actions, unconstrained by necessity or fate; voluntariness.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dree will,
• cree will,
• vree will,
• gree will,
• tree will,
• rree will,
• feee will,
• fdee will,
• ffee will,
• ftee will,
• f5ee will,
• f4ee will,
• frwe will,
• frse will,
• frde will,
• frre will,
• fr4e will,
• fr3e will,
• frew will,
• fres will

The adjective form of "free will" is "freewill" or "free-willed".

The plural of the "free will" can be the "free wills".

The singular of the "free will" can be the "free will".