ἀπροαίρετος

ον, Adv.
A. without set purpose, not deliberate, of actions, Arist. EN 1135b10, Arr. Epict. 2.16.1, Plot. 1.2.5, etc. Adv. ‐τως Hp. Prog. 2, Arist. EN 1106a3, Phld. Ir. p.93 W., etc.
2. of things, incapable of choice or purpose, Hermog. Id. 2.4; not under the control of will, Phld.D. 3 Fr. 75, M.Ant. 6.41,al.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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