O / ŏbultrōnĕus
adjective gloss

ŏbultrōnĕus

fem. ŏb-ultrōnea · neut. ŏb-ultrōneum
voluntary
voluntary, spontaneous: ultroneus, obultroneus, Not. Tir. p. 83: † obultroneus, αὐθαίρετος, Gloss. Philox.