Why is it die Beharrlichkeit?

Beharrlichkeit ends in -keit, and nouns ending in -keit are feminine: in a German dictionary, 100% of them take die.

All nouns ending in -keit
Sense 1
die

Meaning

[1] persistent capacity to be persistent

[1] Beharrlichsein; Eigenschaft, beharrlich zu sein

Examples

[1] He had fought with immense perseverance to ensure that the health insurance company took over the treatment costs of his daughter

[1] Er hatte mit immenser Beharrlichkeit dafür gekämpft, dass die Krankenkasse die Behandlungskosten seiner Tochter übernahm.

[1] "Environmental certainty is adhered to perseverance that can prove to be preserved as the human being"

[1] „Lebensweltlichen Gewissheiten haftet eine Beharrlichkeit an, die sich als Wahrung des Humanen zu erweisen vermag.“
More source examples (2)

These dictionary examples can include historical and less common uses.

[1] "He saw him a very sharp and clearly thinking intellectual man who only used the power to which his energy and persistence had reached him, only for the benefit of Russia" "

[1] „Er sah in ihm einen sehr scharf und klar denkenden Verstandesmenschen, der die Macht, zu der ihn seine Energie und seine Beharrlichkeit hatten gelangen lssen, lediglich zum Wohle Russlands benutzte.“

[1] "This highly insulting persistence appeared to me monsterly"

[1] „Diese höchst beleidigende Beharrlichkeit erschien mir ungeheuerlich.“

Declension

1 Singular Plural
Nominativ die Beharrlichkeit —
Genitiv der Beharrlichkeit —
Dativ der Beharrlichkeit —
Akkusativ die Beharrlichkeit —

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary