Οὔτοι ποθ' οὑχθρός, οὐδ' ὅταν θάνῃ, φίλος → One's enemy does not become one's friend when they die
automatic, acting of itself: P. and V. αὐτόματος.
voluntary: P. and V. ἑκούσιος, αὐθαίρετος, αὐτεπάγγελτος.