Thesaurus / weak minded
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLE SENTENCES FROM THE WEB

Of course this applies also to the wife of a weak minded husband.
WOMANWILLIAM J. ROBINSON
To live with a woman like you and waste one minute with Althea—well—it's weak minded, that's what it is.
CINDERELLA JANEMARJORIE BENTON COOKE
I then saw that he was not crazy, but that suffering and hardship had made him weak minded.
They terrify the weak minded by frightful ideas which they hold out to them of the Deity.
LETTERS TO EUGENIAPAUL HENRI THIRY HOLBACH
I wanted to save some, I wanted to protect the young and the weak minded.