Englishfor English speakers
realm
Noun
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A realm is a kingdom, country or state which is ruled by a king or queen.
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A realm is the area of a certain abstraction.
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A realm is an abstract sphere of influence, either real or made up.
of
Preposition
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Made using.
It is a house of cards.
rationality
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noun
(= reason)
the state of having good sense and sound judgment
his rationality may have been impaired
he had to rely less on reason than on rousing their emotions
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noun
the quality of being consistent with or based on logic