HSK V7-9
Correct

连绵

/ liánmián / 
Strokes

Definition

continuous/unbroken/uninterrupted/extending forever into the distance (of mountain range, river etc)

Example

As a Verb
be continuous; stretch/extend long and unbroken
1
Liánmiánqǐfú
连绵起伏
de
的
qúnshān
群山

rolling/undulating hills

2
Zhànhuǒ
战火
liánmián
连绵

endless wars

3
Yīnyǔ
阴雨
liánmián
连绵

long/unbroken spell of wet weather