This is the 11726th most frequent Russian word.
завтраку
"Завтраку" is the dative singular form of "завтрак," meaning "breakfast."
Here, 'завтраку' is in its dative case form, used after the preposition 'к' indicating direction or relation towards breakfast.
Я готовлюсь к завтраку.
I am preparing for breakfast.
In this sentence, 'завтраку' is in the dative case, part of the prepositional phrase 'по завтраку', which describes relationships or concerns.
Мама дала указания по завтраку.
Mom gave instructions regarding breakfast.
Here, the dative case 'завтраку' is used with the verb 'приступить к', expressing the initiation of an action towards breakfast.