robust

(adjective): Evincing strength and health; strong.
(adjective): Violent; rough; rude.
(adjective): Requiring strength or vigor
(adjective): Sensible (of intellect etc.); straightforward, not given to or confused by uncertainty or subtlety
(adjective): Designed or evolved in such a way as to be resistant to total failure despite partial damage.
(adjective): Resistant or impervious to failure regardless of user input or unexpected conditions.
(adjective): Not greatly influenced by errors in assumptions about the distribution of sample errors.