Correct

单弱

/ shàn ruò / 
Strokes

Example

As an Adjective

thin and weak; frail; not strong

1
Shēntǐ
身体
shàn
单
ruò
弱

fragile construction

As an Adjective

weak (in force)

2
Bīnglì
兵力
shàn
单
ruò
弱

be short of men