mecanismo
/mekaˈnismo/ · B2 · noun · m
mechanism
⚙️ mecanismo = Greek mēkhanē (machine) + -ismo, the working parts of a machine
Sounds like mechanism with the same root as mechanic. Spanish swaps the English -ism ending for -ismo. Link meca- to mechanic and you can recall that a mecanismo is the system of parts that makes something work.