To sprinkle or scatter over a surface; to spread throughout.
From Latin conspergere (to sprinkle together), from con- (together) + spargere (to scatter or sprinkle). This is an extremely archaic English verb, barely used after the 17th century.
This word is so old that modern English speakers would never use it, but 'sparge' (a current English word meaning to spray or sprinkle in brewing) comes from the same Latin root—showing how old verbs fade while newer ones based on the same root survive.
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