This is the 2073rd most frequent Arabic word.
بالغ
Adult; mature.
Here, 'بالغ' is used as an adjective to describe someone who has reached maturity or a certain age, in this case, adulthood at 18.
الطالب البالغ من العمر ثمانية عشر سنة يدخل الجامعة.
The student, who is eighteen years old, enters the university.
In this sentence, 'بالغة' is used as an adjective meaning 'immense' or 'great,' paired with 'الأهمية' to emphasize the significance of the conversation.
تحدث الأب بلغة بالغة الأهمية مع ابنه.
The father spoke in a language of great importance with his son.
'يبالغ' here is a verb meaning 'to exaggerate,' so the phrase discusses moderation in description.