Sentence:  ... No Art used to inflame him, no Coquetry practised to tempt or intice him, and no Prudery or Affectation to <WSD>tamper</WSD> with his Passions; but, on the contrary, artless and unpractised in the Wiles of the World, all her Endeavours, and even all her Wishes, tended only to render herself as un-amiable as she could in his Eyes: 
Meaning of the word marked with <WSD> tags:  To meddle ("with" something) in order to corrupt or pervert it.