English term
Brazil
haunting melodies
"From yon chamber, the sweet scents of spices come to warm me ... soft, haunting melodies entice me ever forward..."
Enchantress: http://en.wikipedia.org/wiki/Enchantress_(Marvel_Comics)
Proposed translations
músicas/melodias suaves que enfeitiçam (e me fazem seguir...)
enfeitiçado : 1. que enfeitiçou 2 p.ext. que foi seduzido, que se fascinou
Brazil
Brazilian lawyer - 40+ years in Brazil
Native in: English (Variants: Scottish, British, UK, Irish, US, Australian, Canadian, New Zealand) 
, Portuguese (Variants: Brazilian, Mozambican, Angolan, European/Portugal) 
Works in: Portuguese to English, English to Portuguese, English, and 1 more.
músicas cativantes
Brazil
my motto:professionalism and dedication.
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English
melodias inesquecíveis, marcantes
www.babylon.com/definition/haunting/Portuguese
Brazil
Team of Two Native Speakers
Native in: English (Variant: US) , Portuguese (Variant: Brazilian)
Works in: Portuguese to English, English to Portuguese, English, and 1 more.
melodias obcecantes
Ivanete Martins Mastroberardino
Technical and literary translations
Native in: Portuguese
Works in: English to Portuguese, Spanish to Portuguese, English to Spanish, and 2 more.
melodias intrigantes/inquietantes
Espero que ajude!
United States
Spreading the Word in Three Languages
Native in: Portuguese
Works in: English to Portuguese, Spanish to English, Portuguese to English, and 3 more.
melodias constantes
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Note added at 23 mins (2011-08-28 19:50:01 GMT)
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Do dicionario Merriam-Webster:
1haunt verb \ˈhȯnt, ˈhänt\
Definition of HAUNT
transitive verb
1
a : to visit often : frequent
b : to continually seek the company of
2
a : to have a disquieting or harmful effect on : trouble <problems we ignore now will come back to haunt us>
b : to recur constantly and spontaneously to <the tune haunted her>
melodias inebriantes
Portuguese to English, English to Portug
Native in: English
Works in: Portuguese to English, English to Portuguese
melodias assombrantes
Electric Engineer/Military
Native in: Portuguese
Works in: English to Portuguese, Portuguese to English
melodias com efeitos encantadores - melodias com poderes irressitíveis
- Blog William Douglas: Ulisses e o canto das sereias
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Discussion
Lol! :P