LessonsDiptote Causes — Ultimate Broken-Plural PatternsQuiz

A broken plural changes the internal shape of the singular, as in كِتَابٌ ← كُتُبٌ and مَسْجِدٌ ← مَسَاجِدُ.

كُتُبٌ is a broken plural, but does not follow the ultimate-plural pattern defined in the book, and remains fully declinable.

مَسَاجِدُ is both a broken plural and one of the specified patterns; it is therefore a diptote.

WordMeaning
كُتُبٌBroken plural, fully declinable
مَسَاجِدُBroken plural, diptote

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Ultimate Plural Pattern Versus Broken Plurals Generally

Diptote Causes — Ultimate Broken-Plural Patterns

A broken plural changes the internal shape of the singular, as in كِتَابٌ ← كُتُبٌ and مَسْجِدٌ ← مَسَاجِدُ.

كُتُبٌ is a broken plural, but does not follow the ultimate-plural pattern defined in the book, and remains fully declinable.

مَسَاجِدُ is both a broken plural and one of the specified patterns; it is therefore a diptote.

WordMeaning
كُتُبٌBroken plural, fully declinable
مَسَاجِدُBroken plural, diptote