unüberholbar  , indépassable

indépassable [EtreTemps  ]
not  -to-be-bypassed [BT]

NT: Not-to-be-bypassed (unüberholbar), 250-256, 258-259, 263-265, 307, 309, 330, 383, 386, 391. See also Being toward death; Being toward the end [BT]