Meaning of the word "an old man is twice a child" in English

What does "an old man is twice a child" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

an old man is twice a child

US /æn oʊld mæn ɪz twaɪs ə tʃaɪld/
UK /æn əʊld mæn ɪz twaɪs ə tʃaɪld/
"an old man is twice a child" picture

Idiom

a proverb suggesting that as people become very old, they often become as dependent and physically or mentally weak as children

Example:
Caring for my grandfather reminds me that an old man is twice a child.
He needs constant supervision now; truly, an old man is twice a child.