say it: AN-suh-ler-ee
ancillary is an adjective meaning "furnishing added support". It carries one recorded sense.
furnishing added support
“an ancillary pump”
“an adjuvant discipline to forms of mysticism”
“The mind and emotions are auxiliary to each other”
Definitions, synonyms and semantic relations for ancillary 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.