Sentence:  This by-dialogue prevented my hearing what passed between the prisoner and Captain Thornton; but I heard the former <WSD>snivel</WSD> out, in a very subdued tone, “And ye'll ask her to gang nae farther than just to show ye where the MacGregor is?—Ohon! ohon!” 
Meaning of the word marked with <WSD> tags:  To say (something) while sniffling or crying.