chispear
drizzle
chispa
spark
+
-ear
verb suffix
Chispear means to drizzle and can be thought of as chispa0 (spark0) + -ear1 (verb suffix1), like tiny sparks of rain falling.
verb
  1. drizzle
    To drizzle or sprinkle (rain)
    Está chispeando afuera, lleva un paraguas. // It's drizzling outside, take an umbrella.