to combine again, often in a different way, or to cause this to occur;
e.g. He had to recombine the mixture using fresh ingredients because he had forgotten to note the proportions.
(verb)
to undergo the process of genetic recombination during cell division, which leads to the individual having new combinations of genes that were not present in the parents;
e.g. When genes recombine, they can lead to the individual showing traits that neither of their parents have.