-cide
/sʌɪd/combiningForm
1Denoting a person or substance that kills: insecticide regicide
2Denoting an act of killing: suicide
Derivatives
-cidal
In corresponding adjectives.
-cidally
In corresponding adverbs.
Origin
Via French; sense 1 from Latin -cida; sense 2 from Latin -cidium, both from caedere 'kill'.