This is the 1193rd most frequent Arabic word.
غاية
"غاية" means "goal," "end," or "purpose."
In this sentence, 'غاية' means 'goal' or 'objective', describing the purpose behind someone's action.
كانت غايتي من السفر الاستمتاع بالطبيعة.
My goal from the trip was to enjoy nature.
Here, 'غاية' is part of the phrase 'في غاية', which means 'extremely' or 'of extreme' to emphasize the quality described.
كتب المقال بأسلوب في غاية الروعة.
He wrote the article in an extremely wonderful style.
In this context, 'غاية' is used in a construct 'غاية في', indicating a superlative emphasis on the adjective 'الجمال' (beauty).