Sentence:  [T]hey had both been educated [...] on plans at once narrow and <WSD>promiscuous</WSD>, first in an English family and afterwards in a Swiss family at Lausanne, their bachelor uncle and guardian trying in this way to remedy the disadvantages of their orphaned condition. 
Meaning of the word marked with <WSD> tags:  Made up of various disparate elements mixed together; of disorderly composition.