salt away
• discreetly store or save something, especially money.
• "they salted the money away in numbered bank accounts around the world"
Similar:
save,
put aside,
put away,
put by,
lay by,
set aside,
lay aside,
put to one side,
reserve,
keep in reserve,
deposit,
keep,
store,
stockpile,
hoard,
stow away,
cache,
squirrel away,
stash away,
