| Word | Definitions | Synonyms |
|---|---|---|
| unforgettably | (adverb) in a memorable manner | Synonyms: memorably |
| unforgivably | (adverb) in an unpardonable manner or to an unpardonable degree | Synonyms: inexcusably, unpardonably |
| unforgivingly | (adverb) without forgiveness; in an unforgiving manner | - |
| unfortunately | (adverb) by bad luck | Synonyms: alas, regrettably, unluckily |