'angerless' is formed from the noun 'anger' and the suffix '-less', where '-less' means 'without'.

'anger' comes from Old Norse 'angr' meaning 'grief' or 'sorrow', and '-less' is an Old English suffix meaning 'without'. The combination 'angerless' has been used in English since the 19th century.

Initially, it meant 'without anger', and this meaning has remained unchanged in modern usage.