Meaning

originFrom Middle English [Term?], from Old Norse daufr (“deaf”) (whence also Icelandic daufur (“deaf, dull”)), from Proto-Germanic *daubaz (“deaf”), from Proto-Indo-European *dʰūbʰ-, *dʰūp- (“to smoke”). Doublet of daff, deaf, and dof. Compare dove ("to slumber"). More at deaf.

Etymology from Wiktionary, CC BY-SA 3.0