1) Carefully 2) Cautiously 3) Charily 4) Close to the vest 5) Doubtfully 6) Gingerly 7) Timidly 8) Watchfully 1) Carefully 2) Cautiously 3) Evasively 4) Guardedly 5) In a cautious way 6) In a wary manner 7) Reticently 8) Secretively 9) With a cautious eye 10) With caution 11) With some suspicions 
• (adv.) In a wary manner.
Wa'ri·ly adverb In a wary manner. 
[adv] - in a wary manner
adverb in a wary manner; `the sailor watched the sky warily`