an element used as a ligature; combines main and auxiliary verbs or nouns and relational words
For example: xochitica (through or by means of flowers); quetzaltica (through or by means of quetzal feathers). Other places one will see the -ti- ligature: tlalticpac, caltitech, tepetitlan, etc.
tlamahuizoltica = through a miracle, by means of a miracle (from tlamahuizol-li, "miracle" + ti (ligature) + -ca (instrumental relational word, "with, by means of"). You could also say "ica tlamahuizolli."