e·va·sion 
(ĭ-vāzhən)
(ĭ-vāzhən)n.
1. The act or an instance of evading.
2. A means of evading; a subterfuge.
[Middle English evasioun, from Old French evasion, from Late Latin ēvāsiō, ēvāsiōn-, from Latin ēvāsus, past participle of ēvādere, to evade; see EVADE.]