'good-humored' originates from English, specifically the compound 'good' + 'humored', where 'good' meant 'pleasant or of good quality' and 'humor' (from Latin 'humor') meant 'bodily fluid; temperament'.

'humor' came into English via Old French 'humeur' from Latin 'humor' meaning 'fluid'; in Middle English 'humour' came to mean 'temperament', and from this developed the adjective 'humored' and the compound 'good-humored'.

Initially, 'humor' referred to a bodily fluid; over time it shifted to mean 'disposition' or 'temperament', and 'good-humored' evolved to mean 'having a pleasant disposition'.