動詞 haunt:

1. follow stealthily or recur constantly and spontaneously to
   同義詞：haunt, stalk
2. haunt like a ghost; pursue
   同義詞：haunt, obsess, ghost
3. be a regular or frequent visitor to a certain place
   同義詞：frequent, haunt

形容詞 haunting:

1. continually recurring to the mind- Claudia Cassidy
   同義詞：persistent
2. having a deeply disquieting or disturbing effect-Charles Lee

1. A haunting melody.
   縈繞心頭的旋律
2. Separatism and racial conflict has been haunting the post- cold war community.
   分離主義和種族沖突一直困擾著後冷戰(zhàn)時代的國際社會。

haunt.ing

adj.（形容詞）
Continually recurring to the mind; unforgettable:
縈繞心頭的：經(jīng)常出現(xiàn)在腦中的；不能夠忘懷的：
例句：
a haunting melody.
縈繞心頭的旋律

【引伸】
haunt.ingly
adv.（副詞）