ambul=walk,表示“行走,走路”
ambulance 救护车,流动医院(ambul+ance→走的东西→救护车)
ambulant走动的,流动的(ambul+ant)
circumambulate环行,绕…而行(circum绕圈+ambul+ate→绕着走)
somnambulate梦游,梦行(sonm睡+ambul+ate→睡着走→梦游)
perambulate游历,巡游(per到处+ambul+ate→到处走遍→游历)