instratus
From LSJ
Latin > English (Lewis & Short)
in-strātus: a, um, adj. 2. insterno,
I not covered or spread over: cubile, an unspread couch, Verg. G. 3, 230 (so interpp. plur. ad loc.; but it is better to construe instrato as part. of insterno, with frondibus hirsutis; cf.: instrata cubilia fronde, Lucr. 5, 987 Wakef. ad loc.).
instrātus: a, um, Part., from insterno.