'rarely-viewed' originates from the combination of 'rarely,' meaning 'not often,' and 'viewed,' the past participle of 'view,' meaning 'to see or watch.'

'rarely' comes from Middle English 'rarelī,' and 'viewed' from Old French 'veue,' which evolved into the modern English 'view.'

Initially, 'rarely' meant 'seldom' and 'viewed' meant 'seen,' and this meaning has largely remained the same in modern usage.