enseal

verb3

1. •
   To enclose with a seal, i.e. to prevent leakage.
2. •
   (no longer used) To mark with, or as if with, a seal (stamp)

   • So he wrote letters, ensealed with his ring, to his first daughter, that said that she loved him more than herself[…] — 1905
3. •
   (no longer used) To ratify.