HSK 7–9 grammar · conjunction
⋯⋯，甚至于⋯⋯
⋯⋯，甚至于⋯⋯ — even to the point of
Pattern
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( ) can be left out · other words may come before, between and after
How it works
甚至于 is the fuller, more formal form of 甚至, introducing the most extreme item or outcome: "even to the point that". The 于 adds weight and is characteristic of written style.
Examples
他忙得忘了吃饭，甚至于忘了睡觉。
Tā máng de wàng le chīfàn, shènzhìyú wàng le shuìjiào.
He was so busy he forgot to eat, and even forgot to sleep.
很多人不了解，甚至于误解了这项政策。
Hěn duō rén bù liǎojiě, shènzhìyú wùjiě le zhè xiàng zhèngcè.
Many people don't understand this policy — some even misread it.
Related
甚至 · 甚至 — even / to the point that⋯⋯，乃至⋯⋯ · ⋯⋯，乃至⋯⋯ — and even, going as far as⋯⋯，以至于⋯⋯ · ⋯⋯，以至于⋯⋯ — to the point that
See it in a story
In the app, ⋯⋯，甚至于⋯⋯ is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.