no / not any
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no / not any
Negates a noun with an indefinite article (ein/eine) or with no article. It expresses that something is not present or does not apply.
Ich habe leider keinen Stift für dich.
Unfortunately, I don't have a pen for you.
The word `kein` (no / not any) is used to negate nouns that appear with `ein`/`eine` (a/an) or with no article in the positive sentence. It is declined like the indefinite article and agrees with the noun in gender, number, and case.
Ich habe einen Hund. → Ich habe keinen Hund.
I have a dog. → I don't have a dog.
In the meaning 'not the kind of', `kein` (not a) is often used in emotional or evaluative statements. It expresses that something does not really deserve the label.
Das ist doch kein richtiges Essen, das ist nur ein Snack!
That's not real food; it's just a snack!
To make a negation absolute, `kein` (no / not any) is often intensified with `einzig` (single). The phrase `kein einziger` / `keine einzige` / `kein einziges` means 'absolutely zero' or 'not a single one'.
Kein einziger Gast hat sich über das Essen beschwert.
Not a single guest complained about the food.
a / one
'ein' and 'kein' often come before a noun and look similar in form, but they mean the opposite. You use 'ein' when you are talking about a single, not more specifically identified thing or person. It can also emphasize the number 1. You use 'kein' when you say that such a thing or person is not there or does not apply. Learners easily confuse the words because both stand like articles before the noun. The important point is: 'ein' confirms something, while 'kein' negates it.
Heute Abend war kein Training, weil die Halle geschlossen war.
There was no training this evening because the gym was closed.
Im Sommer hat ein Freund bei der Arbeit geholfen.
In the summer, a friend helped out at work.