Sentence:  Whereas the high vowels /ʏ, y/ <WSD>unpack</WSD>, the mid vowels /œ, ø/ are adapted as single segments in these languages (see examples in (36) for Vietnamese (Barker 1969) and (37) for Fon (Gbeto 2000)). [...] / French /y/ → Vietnamese /wi/ / acc<u>u</u> [a'k<u>y</u>] → ac-q<u>uy</u> [ak k<u>wi</u>] 
Meaning of the word marked with <WSD> tags:  To undergo separation of its features into distinct segments.