死しに絶たえる

ichidan verb, intransitive verb

die out; become extinct

Used for species, families, or lineages dying out completely. Often implies a gradual process or a final end.

• その種しゅはすでに死しに絶たえたと考かんがえられている。

  That species is thought to have already died out.

• 彼かれの家か系けいは彼かれの代だいで死しに絶たえた。

  His family line died out with his generation.