• ___ in (yielded)
• Buckled
• Collapsed, with 'in'
• Did some spelunking
• Finally said yes
• Gave in
• Gave up, slangily
• Hollowed out
• Spelunked
• Submitted
• Succumbed to duress
• Surrendered
• Surrendered (with in)
• Went spelunking
• Yielded
• Yielded (with in)
• Yielded to pressure