"to admit, to confess; frankly" is Признаться in Russian.
Признаться means "to admit, to confess; frankly" in English.
Listen to the pronunciationWord #1448 of 4,000 by frequency in Russian — level B1.
Он решил признаться в своей ошибке перед всем классом.
He decided to admit his mistake in front of the whole class.