In-advertence refers to the lack of attention or carefulness towards something important. Antonyms for this word would encompass terms like attentiveness, mindfulness, alertness, vigilance, prudence, circumspection, and wariness. These antonyms denote a focused state of mind which is essential to avoid mistakes, consequences or oversight of incidents. They also suggest an active engagement in the task or situation, whereby the individual is cognizant of the consequences of their actions. Thus, while in-advertence is a quality that all individuals would benefit from diminishing, the use of its antonyms can lead to a more attentive and effective approach towards any goals or objectives.