What is the meaning of Lesz?

future of van (to be): will be

to become, get, turn into (out of someone or something: -ból/-ből; into something, achieving a state: nominative or [less commonly] -vá/-vé)

to come into being, come to be, get (to have) (as if due to external circumstances)

to occur, come to pass, come about, happen, come into being, take place, befall (with -val/-vel)

must be, have to be (expressing probability or logical necessity)

slag (hard aggregate remaining as a residue from blast furnaces, sometimes used as a surfacing material)

shammy, suede

Source: wiktionary.org