The Spanish verb 'chispear' comes from the noun 'chispa' meaning 'spark' combined with the common Spanish verb suffix '-ar'. The word 'chispa' itself is believed to be onomatopoeic in origin, imitating the sound of a spark or sizzle. The verb 'chispear' has developed two main meanings: 'to spark' (directly related to its root meaning) and 'to drizzle' (referring to the light, spark-like drops of rain).

The semantic extension from 'spark' to 'drizzle' is a beautiful example of metaphorical development, where the small, scattered nature of sparks was seen as similar to the tiny droplets of a light rain.

The noun 'chispa' is a simpler and more common Spanish word that's directly related to 'chispear'. While 'chispa' refers to a literal spark or small flash of light, it has also developed figurative meanings in Spanish, such as in the phrase 'tener chispa' meaning 'to be witty' or 'to have spark/flair'.

Since 'chispear' comes from an onomatopoeic origin specific to Spanish, there aren't direct cognates in English. However, English speakers might find it helpful to think of similar sound-based words like 'sizzle' or 'fizz' which also describe sounds associated with sparking or spattering, though these aren't etymologically related.