irragionevole
unreasonable; irrational
adjective eer-rah-joh-NEH-voh-leh Rare
Origin: From Latin 'in-' (not) + 'rationabilis' (rational).
Usage Note
Irragionevole is the negative of ragionevole (reasonable) and is used in both everyday and formal/legal Italian. In legal contexts it often appears in expressions like termine irragionevole (unreasonable deadline) or dubbio irragionevole (unreasonable doubt). It is a two-endings adjective (-e for both genders; -i for both plural genders). The antonym is ragionevole.
Examples
"La sua richiesta sembra del tutto irragionevole."
Natural Translation
His request seems completely unreasonable.
Related Words
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