hide away
Conceal from sight
Hide away means to conceal oneself or something in a secluded place, often for protection or privacy.
A person might hide away from the world during difficult times: She hid away in her room for days after the breakup.
As a noun, a hideaway is a secluded retreat or refuge: Their cabin was a perfect hideaway from city life.
sanctuary
Protected sacred space
seclusion · solitude · escape · respite · shelter · oasis · hermitage · withdrawal · sequester · recluse
stash
Hidden reserve
hoard · store · safeguard · keep secret · stockpile · treasure · valuables · keepsake · secret stash · nest egg