1. Impossible to subdue
   - indomitable, never-say-die

See also: unconquerable

• sticky wicket
• stickybeak
• Stictomys
• Stictopelia
• Stictopelia cuneata
• Stieglitz
• stiff
• stiff aster
• stiff gentian
• stiff upper lip
• stiff-backed
• stiff-branched
• stiff-haired
• stiff-necked
• stiff-tailed
• stiffen
• stiffener
• stiffening
• stiffish
• stiffly
• stiffness
• stiffy
• stifle
• stifled
• stifler