gersum/ˈɡɜːsəm/EtymologyFrom Middle English gersom, gersum, from Old English gærsum, gersum, gærsuma, from Old Norse gersemi, gørsemi (“treasure”), from gerr, gǫrr (“ready”) + -semi (“-ness”), with the ending assimilated to native -sum. Compare garrison.nounA lump sum paid by individuals who take a lease of landed property in England.“[…]but now it paieth ſeauentie pounds by weight to the King, and an hundred ſhillings for a *Gerſume to the Queene;”