This is one of the riddles from Wilhelm Binder's Flores Aenigmatum Latinorum (1857).
Quid Est?
Est aliquid, quod, si videas, sinis usque iacere,
Et, si non videas, sat scio, tollis humo.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are only two words in this poem that are not on the DCC list:
nux (nucis, f.): nut
vitiōsus, -a, -um: faulty, bad, corrupt
aliquis -quae -quod: some, any; si quis, si quid: anyone who, anything that
et: and
humus -ī f.: ground; humī: on the ground
iaceō iacēre iacuī: lie
nōn: not
qui quae quod: who, which, what / quis quid: who? what? which?
satis/sat: enough, sufficient
sciō -īre -īvī/-iī -ītum: know
sī: if
sinō sinere sīvī situm: allow, let go
sum, esse, fuī: be, exist
tollō tollere sustulī sublātum: raise up, destroy
ūsque: up to; continuously
videō vidēre vīdī vīsum: see
