突とつ然ぜん変へん異い

noun, noun or participle which takes 'suru', intransitive verb

mutation

Biological term for a change in genetic material. Can also be used figuratively for a sudden, unexpected change, but the core sense is scientific.

• この植しょく物ぶつは突とつ然ぜん変へん異いで新あたらしい色いろの花はなを咲さかせるようになった。

  This plant came to bloom with a new color of flower due to a mutation.

• ウイルスが突とつ然ぜん変へん異いを起おこし、感かん染せん力りょくが強つよまった。

  The virus underwent a mutation and became more infectious.