To blend thoroughly; to mix completely together until indistinguishable (archaic or rare usage).
From 'a-' (prefix intensifying the verb) + 'blend.' An older English word that has largely fallen out of use in favor of simpler 'blend.'
This word is so archaic that modern English just uses 'blend,' but 'ablend' shows how English once loved adding 'a-' prefixes to intensify verbs—a pattern mostly dead today.
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