'bileless' originates from the word 'bile,' which comes from Latin 'bilis,' meaning 'bile' or 'bitterness.' The suffix '-less' indicates the absence of something.

'bile' transformed from the Latin word 'bilis' and eventually became the modern English word 'bile.' The addition of '-less' forms 'bileless.'

Initially, 'bile' referred to a bodily fluid, but it also came to symbolize bitterness or irritability. 'Bileless' thus means free from such qualities.