'heat-wise' originates from the combination of 'heat' and the suffix '-wise', where 'heat' refers to temperature and '-wise' means 'in terms of'.

'heat-wise' evolved from the use of '-wise' as a suffix to denote 'in terms of' or 'regarding', combined with 'heat'.

Initially, '-wise' was used to denote direction or manner, but over time it evolved to mean 'in terms of' or 'regarding' when combined with nouns like 'heat'.