also: ばっそん
noun
Formal or literary term for one's descendants or future generations. Often used in historical or ceremonial contexts.
この地は末孫に至るまで守り続ける。
We will protect this land for our descendants.
末孫の繁栄を祈る。
I pray for the prosperity of posterity.
Compound of 末 (matsu, 'end, future') and 孫 (son, 'grandchild'), literally meaning 'last grandchild' or 'distant descendant'. The reading まっそん is a regular sound change from まつそん.