5 entries under expression topic. ×

1
out of wedlock
0
in secret
0
sold clandestinely(adverb, bootleg)
0
under cover
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under the table(idiom, adverb, bootleg)
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APASmart Define. (2015). illicitly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/illicitly/thesaurus/synonyms
ChicagoSmart Define. 2015. "illicitly thesaurus" https://smartdefine.org/illicitly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, illicitly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/illicitly/thesaurus/synonyms>.
MLASmart Define. "illicitly thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/illicitly/thesaurus/synonyms>