descent

noun
C1+
1
C1+
an action of coming or going down
فرود, نزول, پایین آمدن
opposite ascent
2
a slope going downwards
سرازیری, شیب, سرپایینی
There is a gradual descent to the sea.
opposite ascent
3
a person’s family origins
تبار, اصل و نسب, نژاد
to be of Scottish descent
He traces his line of descent from the Stuart kings.
synonym ancestry