Correct

下半辈子

/ xià bànbèizi /
Strokes

Example

As a Noun

latter half of one's life; one's remaining years; the rest of one's life

1
shì
xià
bànbèizi
半辈子
de
wéi
唯一
tuō
依托
  

He will be my sole support for the rest of my life.