Kas'raTen: TanWeen 
Kas’raTen is written as “double kasras”, which always only appears at the end of words, at the bottom of the last letter, to enhance the sound of the last letter with “Tin”.

مَثَلٍ

بَلَدٍ

ثَمَرَةٍ

بَيتٍ

Tin

وَردَةٍ

عَمَلٍ

جَبَلٍ

نَهَرٍ

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