derisory/derisive

Although the words derisory and derisive share similar roots, they have different core meanings.
Derisory usually means ‘ridiculously small or inadequate,’ as in:
*a derisory pay offer
*the security arrangements were derisory.
Derisive, on the other hand, is used to mean ‘showing contempt,’ as in:
*he gave a derisive laugh.