無条件

Etymology
Compound of

Adjective

 * 1) absolute, unconditional

Usage notes
The use of the particle to make this into an adjective appears to be a relatively recent innovation. This term is listed in many dictionaries   only as a noun, which may be used with the particle  to modify a following noun. As such, the form 無条件な might be viewed as proscribed in more formal contexts.

Noun

 * 1) absoluteness, unconditionality