on; on top; upon; first (of two parts); previous or last (week etc); upper; higher; above; previous; to climb; to go into; above; to go up; to attend (class or university); third tone of putonghua[cedict]
木質
mù zhìㄇㄨˋ ㄓˋ
wooden[cedict]
臺階
tái jiēㄊㄞˊ ㄐㄧㄝ
flight of steps (leading up to a house); step (over obstacle); bench; fig. way out of an embarrassing situation[cedict]