'pulseless' originates from the word 'pulse,' which comes from Latin 'pulsus,' meaning 'a beating or throbbing.' The suffix '-less' is used to indicate the absence of something.

'pulse' transformed from the Latin word 'pulsus' and eventually became the modern English word 'pulse.' The addition of '-less' formed 'pulseless.'

Initially, 'pulse' referred to a beating or throbbing, and 'pulseless' has consistently meant the absence of such a beat.