ثمانية

ثمانية

Eight.

Here, 'ثمانية' is used as a noun to indicate the quantity of books purchased.

اشتريت ثمانية كتب جديدة.

I bought eight new books.

In this sentence, 'ثمانية' is used as a numeral adjective modifying the noun 'كراسي'.

هناك ثمانية كراسي في الغرفة.

There are eight chairs in the room.

Here, the word 'الثامن', derived from 'ثمانية', is used as an ordinal adjective to signify the academic term's order in sequence.

هذا الفصل الدراسي هو الثامن منذ التحاقي بالجامعة.

This academic term is the eighth since I joined the university.