| Word | Definitions | Synonyms |
|---|---|---|
| illegally | (adverb) in an illegal manner | Synonyms: illicitly, lawlessly |
| illegibly | (adverb) in an illegible manner | Synonyms: undecipherably, unreadably |
| illegitimately | (adverb) of biological parents not married to each other | Synonyms: out of wedlock |
| (adverb) in a manner disapproved or not allowed by custom | Synonyms: illicitly |