ひざをつく
hizao tsuku

Godan Verb (ku)
Expression

1. to fall to one's knees; to go down on one's knees (e.g. to express respect)

その子供 こどもは、つまずいて ころんで ひざ いた。
sono kodomowa tsumazuite koronde hizao tsuita.
The kid stumbled and fell to his knees.
Other forms: