Leste adj. [lɛst(ə)] – nimble, agile, sprightly, light; risqué (joke); offhand (remark).
This is a word I discovered last night while browsing a French dictionary. It is thought to come from an old Germanic word liste. A related adverb is lestement, which means nimbly, agilely, in a sprightly manner, lightly or offhandedly.
It’s related to the Spanish word listo, which has a number of meanings, including “ready, prepared, clever, sharp-witted, able, nimble”. It’s also related to the Portuguese word lesto, which means “quick, deft, nimble, swift, fleet, light footed, rapid, ready, clever, dexterous or skillful”. Other related words include the German listig (cunning, devious, shrewd) and leicht (easily, effortlessly, gently), which is related to the English word light(ly).
Light (not heavy) comes from the Old English leoht, from Proto-Germanic *lingkhtaz, from the Proto-Indo-European *le(n)gwh- (light, easy, agile, nimble), which is the root of leste, and also of lever [Source]