As everyone knows, words constantly take on new meanings. Since these do not necessarily, nor even usually, obliterate the old ones, we should picture this process not on the analogy of an insect undergoing metamorphoses but rather on that of a tree throwing out new branches, which themselves throw out subordinate branches; in fact, as ramification. The new branches sometimes overshadow and kill the old ones but by no means always.
— C.S. Lewis