Psyche is served by invisible servants.

citharam: A cithara was a guitar or lute-like instrument with seven strings and a flat back and was often played by professional musicians (see example under Media). It was usually associated with Apollo, who was also credited with inventing it.

tantum (adv): only (L&S s.v. tantus II B)

beātitūdō, -inis f.: blessedness, good fortune

monītus, -ūs m.: an admonition

informis, -e: unformed, shapeless

fatīgātiō, -ōnis f.: fatigue

dīluō, -ere, -uī, -ūtus: to refresh, wash away

semirotundus, -a, -um: semicirculuar (a word attested only in Apuleius)

suggēstus, -us m.: raised platform, podium

cēnātōrius, -ā, -um: pertaining to dining

refēctus, –ūs m.:  refreshment

accumbō, -ere, -cubuī, -cubitus: to lie down, recline at table

edūlīs, -e: edible

ferculum, -ī n.: here, a tray

impellō, -ere, -pepulī, -pulsus: to drive forward (L&S sv. impello, IB)

subministrō, -āre: to supply, furnish

famulus, -a, -um: serving, (like a) servant

opīmus, -a, -um: fat, rich

daps, dapis f.: banquet, feast

intrōcēdō, -ere, -cessī, -cessus: to go into (invented by Apuleius)

īnvīsus, -ā, -um: here, “unseen”

modulor, -arī: to measure rhythmically

cōnserō, -sere, -sēruī, -sertus: to connect, join