In order to gain your AO1 marks, you need to know key terminology:
Lexical change:
Acronym
Initial letters of a phrase pronounced as a new word
e.g. RADAR
Affixation
Adds a bound morpheme to an existing word to change word class/tense
Prefix
Precedes existing word
Suffix
Placed at the end of a root word
Blend
Merge two words with the beginning of one word and end of another
e.g. smog
Borrowing
Adopting words from another language
Clipping
Shortens a word
Compound
Combines two whole words to make a new concept
e.g. handbag
, Conversion
Changes word class as the word acquires new functions
e.g. text
Archaisms
No longer in use as object no longer exists
Eponym
Naming something after a person
e.g. Dyson
Mnemonic
A phrase used to remember something
e.g. Never Eat Shreddies Wheat