luigi

The lui page told you to watch the direction of the money, and this is the other half of that sentence. The tenant luas the flat: the money leaves her. The landlord luigas it: the money arrives. One suffix, opposite ends of the same transaction, and no separate vocabulary to memorise - which is more than English manages, since rent does both jobs and let only sometimes helps.

Line up the whole family once and it stays lined up:

• lui - to rent, as the tenant
• luigi - to let out, as the landlord
• luanto - the tenant, the one doing the renting
• luiganto - the landlord, the one doing the letting
• luprezo or lupago - the rent, the money itself

The last one matters because there is a trap sitting next to it. Rento is not the rent. It is unearned income - an annuity, the return on invested money, the thing a rentier lives on - and a sentence about paying rento to your landlord says something quite different from what you meant. The false friends article gives it a full entry, and it is one of the more expensive ones on the list.

If the -ig- still feels arbitrary, this is a good verb to test it on, because the two readings are so concrete. Compare igi and iĝi: luiĝi would be for the flat itself to get rented, which is a thing estate agents say and nobody else does.