| Adv. | 1. | deucedly - (used as intensives) extremely; "she was madly in love"; "deadly dull"; "deadly earnest"; "deucedly clever"; "insanely jealous"intensifier, intensive - a modifier that has little meaning except to intensify the meaning it modifies; "`up' in `finished up' is an intensifier"; "`honestly' in `I honestly don't know' is an intensifier" |