mats.tsa denotes the sleeping surface portrayed as too short for someone to stretch out.

The attested use presents a sleeping surface whose inadequate length prevents stretching out.

1. Sleeping surface too short for rest · dominant

   In Isaiah 28:20, the masculine singular absolute noun occurs in the clause about something being too short for stretching out; the APB renders the clause, "For the bed is too short for stretching out."

   Isaiah 28:20

In the Anselm Project Bible: In Isaiah 28:20, the APB presents the clause as "the bed is too short for stretching out,".