1. Gain or regain energy
   - perk, percolate, pick up, gain vigor [US], gain vigour [Brit, Cdn] 
2. Cause to be alert and energetic
   - stimulate, arouse, brace, energize, energise [Brit]

Derived forms: perks up, perked up, perking up

Type of: affect, convalesce, recover, recuperate

• Cheshire cheese
• chess
• chess club
• chess game
• chess master
• chess match
• chess move
• chess opening
• chess piece
• chess player
• chess set
• chessboard
• chessman
• chest
• chest cavity
• chest of drawers
• chest pain
• chest protector
• chest register
• chest tone
• chest voice
• chested
• asceticism
• Asch
• Aschelminthes