Translation

1. calm, relative quietness (absence of loud sounds) feminine, no-plural

   Lass mich in Ruhe!

   Leave me alone!

2. calm source:freedict-eng-deu-dictd
3. calmness source:wikdict-en-de-stardict
4. relaxation source:dictcc-tuchemnitz-de-en
5. calmness, serenity feminine, no-plural
6. rest, repose feminine, no-plural

   Bist du bei mir, geh ich mit Freuden zum Sterben und zu meiner Ruh.

   If you are with me, then I will go gladly unto [my] death and to my rest.

   O könnt' ich fliegen wie Tauben dahin, weit hinweg vor dem Feinde zu fliehn! In die Wüste eilt' ich dann fort,

   Oh, if I could fly off like the doves, flee far away from the foe! Into the wilderness I would then hasten, and find repose in a shadowy place.

Declension