Unknown. There is only one dubious theory that the word represents a borrowing from a supposed Germanic root *lusta- (“loose, separate”).
lusto
Inflection of lusto (Kotus type 1/valo, no gradation) | ||||
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nominative | lusto | lustot | ||
genitive | luston | lustojen | ||
partitive | lustoa | lustoja | ||
illative | lustoon | lustoihin | ||
singular | plural | |||
nominative | lusto | lustot | ||
accusative | nom. | lusto | lustot | |
gen. | luston | |||
genitive | luston | lustojen | ||
partitive | lustoa | lustoja | ||
inessive | lustossa | lustoissa | ||
elative | lustosta | lustoista | ||
illative | lustoon | lustoihin | ||
adessive | lustolla | lustoilla | ||
ablative | lustolta | lustoilta | ||
allative | lustolle | lustoille | ||
essive | lustona | lustoina | ||
translative | lustoksi | lustoiksi | ||
abessive | lustotta | lustoitta | ||
instructive | — | lustoin | ||
comitative | See the possessive forms below. |