demanding：要求高的，费力的，费心的

词根词缀：de-加强意义 + -mand-命令 + -ing

• stare
• starfish
• stargazer
• stark
• stark-naked
• starlet
• starry
• starship
• star-struck
• star-studded
• start
• startle
• startling
• starvation
• starve
• stash
• stasis
• state
• statecraft
• stateless
• stately
• statement
• stateroom
• stateside
• statesman