Adjective

• S: (adj) reasonable, sensible (showing reason or sound judgment) "a sensible choice"; "a sensible person"
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• S: (adj) fair, fairish, reasonable (not excessive or extreme) "a fairish income"; "reasonable prices"
• S: (adj) reasonable, sane (marked by sound judgment) "sane nuclear policy"
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• S: (adj) rational (consistent with or based on or using reason) "rational behavior"; "a process of rational inference"; "rational thought"
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• W: (adj) irrational [Opposed to: rational] (not consistent with or using reason) "irrational fears"; "irrational animals"
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