[un.as.sail.able] adj (1596): not assailable: not liable to doubt, attack, or question -- un.as.sail.abil.i.ty n -- un.as.sail.able.ness n -- un.as.sail.ably adv
UNASSAILABLE
Meaning of UNASSAILABLE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012