Satsuma wrote:When an ð is at the end of a word, does it become devoiced?
You're probably talking about final obstruent devoicing (Auslautverhärtung)? As far as I know, this phenomenon is not observed in the north Germanic languages, so final /ð/ should be pronounced as [ð]. I've found rather conflicting information on this, my books all transcribe a final ð as voiced, but Wikipedia says this:
The dental fricatives [θ] and [ð] are allophones of a single phoneme. /θ/ is used word-initially, as in þak [θaːk] ('roof'), and before a voiceless consonant, as in maðkur [maθkʏr] ('worm'). [ð] is used intervocalically, as in iða [ɪːða] ('vortex') and word-finally, as in bað [paːð] ('bath'), although it can be devoiced to [θ] before pause. The phoneme /θ/ actually represents a voiceless alveolar non-sibilant fricative [θ̠] or [ð̠] when voiced.
and this in the table below:
before an unvoiced consonant and as the final sound
[θ] maðkur [ˈmaθkʏr̥] ('maggot'), það [θaːθ] ('it')
So, I went to listen to a spoken text sample, and it does seem to be devoiced word-finally!
http://www3.germanistik.uni-halle.de/pr ... en/025.htm
Let's see what the people living in Iceland have to say about it =oD