lock something away
phrasal verb with lock verb uk/lɒk/ us/lɑːk/
B2 把…锁起来，将…妥善保管
to put something in a safe place and lock the door in order that someone else cannot get it
If you keep valuables in your house, lock them away somewhere safe. 如果家里有值钱的东西，就得放在安全的地方锁起来。