This is the 194th most frequent Arabic word.
إضافة
Addition.
Here, "إضافة" is used as a noun meaning 'addition' to suggest something has been added to improve or change.
أحببت الطعم الجديد بإضافة العسل.
I liked the new taste with the addition of honey.
In this sentence, "إضافة" as part of the verb structure 'إضافة إلى' indicates the action of adding.
هل يمكننا إضافة مقاعد جديدة لهذه القاعة؟
Can we add new seats to this hall?
"إضافة" here is a noun referring to the act or effect of adding something which enhanced the beauty.