This is the 10798th most frequent German word.
ruthardt
The word "Ruthardt" is not a standard German word; it is likely a proper noun, such as a surname.
Here, 'ruthardtischen' derives from 'Ruthardt', being used as an adjective to describe principles named after or associated with Ruthardt.
Die ruthardtischen Prinzipien erschienen mir heute besonders relevant.
The Ruthardtian principles seemed particularly relevant to me today.
In this sentence, 'Ruthardt' could be referring to a characteristic, style, or influence attributed to or inspired by Ruthardt.
Ich bewunderte die Ruthardt in ihren Gemälden.
I admired the Ruthardt in her paintings.
Here, 'Ruthardt' is used as a proper name, presumably referring to an individual.