Synonyms:
* Cautiously: This is a very close synonym, emphasizing carefulness and avoidance of risk.
* Suspiciously: This synonym suggests a sense of distrust or doubt.
* Vigilantly: This implies a watchful and alert state of mind.
* Circumspectly: This emphasizes careful consideration of all aspects before acting.
Antonyms:
* Carelessly: This is the direct opposite of "warily," suggesting a lack of caution or consideration.
* Rashly: This implies acting impulsively and without thinking.
* Boldly: This suggests a confident and fearless approach, the opposite of wariness.
* Recklessly: This emphasizes a disregard for danger or consequences.
The best synonym or antonym to use will depend on the specific context and the nuance you want to convey.