Possible Clues:

• Wall against which game is played - two sides needed
• To an extreme degree in past, present or future
• Acute, exteme
• Feeling strongly in verbal form?
• Great when emotional
• Seriously concerned with how decimals work, close to innumerate
• Vived, extreme, acute
• Strong in degree or emotion
• Acute, vivid
• Deep in the past, for example