misery: [14] Latin miser meant ‘miserable, wretched’. From it were derived miseria ‘wretchedness’, source of English misery, and miserābilis ‘pitiable’, source of English miserable [16]. Fitting in with the general semantic pattern, English miser [16] (a direct nominalization of the Latin adjective) originally meant ‘wretched person’. But people who hoarded money were evidently viewed as being basically unhappy, and so right from the beginning miser was used for an ‘avaricious person’. => miser
