'summerlike' originates from the English word 'summer' combined with the suffix '-like', where 'summer' refers to the warmest season of the year and '-like' means 'resembling or characteristic of'.

'summer' from Old English 'sumor', and '-like' from Old English 'lic', meaning 'having the form of'.

Initially, it meant 'having the characteristics of summer', and this meaning has largely remained the same in modern usage.