Related Clues:

• Earth inheritors
• Anything but bold
• Sans oomph
• Proverbial heirs (with ''the'')
• Earth inheritors, with "the"
• Mild partner
• Deferential
• Biblical heirs, with "the"
• Hardly warlike
• Forbearing
• Not forward
• Overly compliant
• Lacking courage
• Earth's heirs?
• Tractable