unformed

unformed
/ˌʌnˈfɔ:md; ʌn`fɔrmd/ adj
not (yet) having developed fully; immature （尚）未充分发展的; 未成熟的
    her ,unformed `handwriting 她那没有功底的书法
    The child's character is as yet unformed. 那孩子的性格尚未定型.

牛津英汉双解词典