1) Awkwardly 2) Illegally 3) Illegitimately 4) In an illegal manner 5) In an unlawful way 6) Sneakily 7) Surreptitiously 8) Uncomfortably 1) Illegally 2) Illegitimately 3) Lawlessly 4) Unlawfully 
illicitly 1. In an illegal manner. 2. In a manner disapproved or not allowed by custom. 3. Descriptive of something which is illegal or disapproved of by society.
adverb in a manner disapproved or not allowed by custom; `He acted illegitimately when he increased the rent fourfold`