This is the 8435th most frequent German word.
kay
The German word "Kay" is a proper noun, typically a male given name, equivalent to "Kai" in English.
Here, 'Kay' is used as a proper noun referring to a person's name as the subject of the sentence.
Ich denke, dass Kay gut Optionen auswählen kann.
I think that Kay can choose good options.
In this sentence, 'kay' is used as an informal acknowledgment or agreement, similar to 'okay'.
Sie fragte mich, ob ich 'kay' gesagt habe.
She asked me if I said 'kay'.
Here, 'kay' is part of the root of 'Kayaker,' referring to individuals engaging in kayaking.