inviolable

adjectives

incapable of being transgressed or dishonored
"the person of the king is inviolable"; "an inviolable oath"
inviolable
antonym
violable
is similar to
impossible to assail
unassailable, untouchable
immune to attack; incapable of being tampered with
"an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
impregnable, inviolable, secure, strong, unassailable, unattackable
must be kept sacred
inviolable, inviolate, sacrosanct
not capable of being violated or infringed
"infrangible human rights"
absolute, infrangible, inviolable