in (one's) trust
In one's care or protection. I knew I shouldn't have left such an expensive item in my assistant's trust. Back in my day, it was normal to leave your kids in your neighbors' trust if you had to step out for a while.
in trust
Especially of money or property, in the protection, care, or guardianship of a trustee. Following her parents' sudden deaths, the young heiress's fortune was held in trust by her paternal grandfather.
in trust
In the possession or care of a trustee, as in The money was held in trust for the children's education. This expression implies having confidence in someone (the trustee). [Mid-1500s]
in somebody’s ˈtrust
, in the trust of somebody
being looked after by somebody: The family pet was left in the trust of a neighbour.