save 2 
(sāv)
(sāv)prep.
With the exception of; except: "No man enjoys self-reproach save a masochist" (Philip Wylie).
conj.
1. Were it not; except: The house would be finished by now, save that we had difficulty contracting a roofer.
2. Unless.
[Middle English, from Old French sauf, from Latin salvō, ablative sing. of salvus, safe; see sol- in the Appendix of Indo-European roots.]