Does any language have a word for a parent-whose-children-have-all-died?

A ten year old is very unlikely to have had children.

And when and where has a 10yo been considered an adult? A 15yo OTOH, yes.

Only if you’re using these words in their specialized biological senses. By a plain interpretation of the words, a one-legged man is neither a biped nor a tetrapod.

Exactly.

Nope.

biped
n
An animal having two feet, such as a bird or human.

tetrapod
n
A vertebrate animal with four feet, legs, or leglike appendages.

Standard dictionary defintions.

What “exactly”? You’re the one who counted anybody under 18 as a child!

Is a one-legged man an animal? Yep. Does he have two feet? Nope. Seems to fail a plain reading of the definition for me. Seems some amputees are of the same mind; since you’re the arbiter of the semantics of this particular word, why don’t you go tell them they’re using it incorrectly?

The Icelandic skald and viking Egil Skallagrimsson wrote a poem expressing his grief over his sons’ deaths in the 11th century; *Sonatorrek *(“The Irreparable Loss Of Sons”) One of his sons drowned in a storm and another had died of a fever slightly earlier.