Solvo (答案):

(1) mal-plena (空的), plen-eco (满，全), plen-ega (极满的), plen-igi (装满，填满), plen-ighi (充满), plen-umi (完成)

(2) mal-levi (降下), ek-levi (突然升起), re-levi (重建，复兴), lev-ado (反复举起), lev-ebla (可升降的), lev-eti (稍抬起), lev-ighi (升起), lev-ilo (杠杆)