insertion：插入，夹入；插入物

词根词缀：in-向内 + -sert-加入 + -ion名词词尾

• syndrome
• synecdoche
• synergic
• synergism
• synergy
• synesthesia
• synod
• synonym
• synonymous
• synonymy
• synopsis
• synopsize
• synoptical
• syntactic
• syntagm
• syntax
• synthesis
• synthesize
• synthesizer
• synthetic
• syphilis
• syphilitic
• syringe
• syrinx
• Syrinx