The boy took another step towards becoming human recently by moving into the bipedal stage. Of course he won't become fully human until he takes the Humanity Test and faces the Gom Jabbar.
'wA-w&rd - adjective
1 : following one's own capricious, wanton, or depraved inclinations : Ungovernable
2 : following no clear principle or law : Unpredictable
3 : opposite to what is desired or expected : Untoward