suspensiveness

But where the emphasis is that of doubt, uncertainty, surprise, or interrogation, the suspensiveness of these emotional states is appropriately expressed by rising intonations; and hence, too, in all sentences in which the interrogative element is strongly present, the rising interval should characterize every syllable in it, and the sentences be uttered with interrogative intonations throughout.

The Ontario Readers: The High School Reader, 1886 Ontario. Ministry of Education