أكبر بالانجليزي

be two/five/ten/fifteen/etc. years somebody's senior means that you are two, five, ten, fifteen, etc years older than someone

أَنَا أَكْبَرُ مِنْهُ بِسِتِّ سِنِيْنٍ

I am six years his senior

هِيَ أَكْبَرُ مِنْهُ بِسَنَةٍ

she is his senior by one year