zero tolerance

:  the arithmetical symbol 0 or 0̸ denoting the absence of all magnitude or quantity

:  additive identity

:  the number between the set of all negative numbers and the set of all positive numbers

:  of, relating to, or being a zero

:  having no magnitude or quantity :  not any

:  having no phonetic manifestation

:  to determine or adjust the zero of

:  capacity to endure pain or hardship :  endurance, fortitude, stamina

:  sympathy or indulgence for beliefs or practices differing from or conflicting with one's own

:  the act of allowing something :  toleration