wishy-washy

US /ˈwɪʃ.iˌwɑː.ʃi/

UK /ˈwɪʃ.iˌwɒʃ.i/

C1

adjective

  • having no color, firm ideas, principles, or noticeable qualities of any type
  • Indecisive; lacking in firmness or conviction.
  • Weak, thin, or lacking in substance.