This little poem is from Giuseppe Gatti's Sales Poetici, Proverbiales, et Iocosi, published in 1703.
Difficile Dissimulare
Difficile est vultu et verbis celare dolorem;
Frons aperit quidquid dissimulare cupis.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
cēlō, cēlāre: hide, conceal, keep secret
dissimulō, dissimulāre: dissemble, disguise
aperiō aperīre aperuī apertum: open
cupiō -ere -īvī -ītum: desire
difficilis -e: not easy, hard, difficult
dolor -ōris m.: pain, grief
et: and
frōns frontis f.: forehead, brow; front
quisquis quidquid: whoever, whichever
sum, esse, fuī: be, exist
verbum -ī n.: word
vultus -ūs m.: look, expression, face