Understanding 'Ambivalence' in Context

In the following passage, the author reflects on the nuances of language and its inherent challenges:

'Language, with all its nuances, often serves not merely as a conduit for communication but as a breeding ground for ambivalence. The richness of dialects, idioms, and cultural references can both enhance understanding and obscure meaning, making even simple exchanges fraught with potential misinterpretation.'

In this context, what does the word 'ambivalence' most closely mean?