This is the 4458th most frequent Arabic word.
وخصوصا
Especially
The word 'وخصوصًا' here is used to specify or highlight 'apples' as a particular example from 'all fruits'.
أنا أحب جميع الفواكه، وخصوصًا التفاح.
I love all fruits, especially apples.
In this sentence, 'وخصوصًا' emphasizes 'at night' as a distinctive time during 'this time of year' with good weather.
الطقس رائع في هذا الوقت من السنة، وخصوصًا في الليل.
The weather is wonderful this time of year, especially at night.
Here, 'وخصوصًا' is used to stress 'as we grow older' as a particular circumstance for 'taking care of our health'.