'typical' originates from Greek, specifically the word 'typikos,' where 'typos' meant 'impression' or 'form.' 'Income' originates from Latin, specifically the word 'incomere,' where 'in-' meant 'into' and 'comere' meant 'to come.'

'typikos' transformed into the Latin word 'typicalis,' and eventually became the modern English word 'typical.' 'Incomere' transformed into the Old French word 'encomer,' and eventually became the modern English word 'income.'

Initially, 'typical' meant 'serving as a type,' and 'income' meant 'money received,' but over time they evolved into their current meanings of 'average' and 'earnings.'