xl1 (la'e zo BY/word-bu) is a fingerspelling sign in character-set of sign language/system of manual communication xl2 representing letter/digit/symbol xl3=l1 in written alphabet/character-set xl2 performed by hand(s) xl4.
From xanle'u+lerfu. See also xanle'u, xanbau, xancrcereme and saskrcereme.