The guide word tells you what the first or last word on that page of the dictionary is. You will need to look at the second letter of the word, and then the third, and so on, in order to find it.

Alliteration' is going to be in the first section of the dictionary under 'a'. There will be lots of entries for each letter of the alphabet, so use the guide word at the top of the page to help you.

How does one track a language evolving so fast? Efforts have involved JRR Tolkein, K-dramas, and a red post box that still stands outside a home in Oxford.