'fangful' originates from the combination of 'fang,' which refers to a long, pointed tooth, and the suffix '-ful,' indicating a full measure or amount.

'fang' comes from Old Norse 'fang,' meaning 'grip' or 'capture,' and '-ful' is a common English suffix used to denote a full measure.

Initially, it meant 'a full measure of something held by a fang,' but over time it evolved into its current metaphorical usage.