'A sailor's wife had chestnuts in her lap, and mounch'd, and mounch'd, and mounch'd: "Give me," quoth I: -- "Aroint thee, witch!" the rump-fed ronyon cries. Her husband's to Aleppo gone, master o' the Tiger: But in a sieve I'll thither sail...' These lines from Macbeth are an example of...

All languages change over time. If you've ever seen an example of Middle English, you will know how difficult it can be to read. And if you've ever seen Old English, it might have seemed impossible to decipher. Language change reflects and is influenced by changes in culture. New experiences will always require new words and ways to describe them.