Definition of fall or drop, or sink, etc. to one's knees in English:

fall (or drop, or sink, etc.) to one's knees

Assume a kneeling position.
More example sentences
  • Catholics in Pope John Paul II's hometown fell to their knees and wept as the news of his death reached them last night at the end of a special mass.
  • And at Santo Domingo airport, relatives of passengers aboard the plane sobbed and fell to their knees in grief.
  • I fell to my knees and started to cry again.
See parent entry: knee

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Word of the day vituperate
Pronunciation: vɪˈtjuːpəreɪt
verb
blame or insult (someone) in strong language...