Proposed derivations include: * Proto-Indo-European *ley- (“to flow”) (cognate with lītus). * Proto-Indo-European *lewH- (cognate with λύω (lúō)). * Proto-Indo-European *leh₁- (“to let, leave”) (cognate with Hittite [script needed] (laizzi, “lets”)) Compare also Latin dēleō and linō.
Oefen met het spreken en memoriseren van " letum " en vele andere woorden en zinnen in Latijn .