weak-minded

/W IY1 K M AY0 N D AH0 D/
adjective
  1. 1

    Foolish or ignorant.

  2. 2

    Weak-willed; easily swayed or corrupted.

  3. 3

    Needy or fearful; characterized by weakness.

  4. 4

    Mentally deficient

Source: https://en.wiktionary.org/wiki/weak-minded