say it: uhn-uh-KOWN-tuh-blee
unaccountably is an adverb meaning "in an unaccountable manner". It carries one recorded sense.
in an unaccountable manner
“in the book, a tycoon unaccountably becomes the hero's friend”
Definitions, synonyms and semantic relations for unaccountably come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.