אִם וְ רַק אִם
Meanings
Conjunction
1. if and only if (mathematics, logic)
Pronunciation
'im v'rak 'im
Examples3
I open the umbrella if and only if it is raining.
An integer is natural iff it is greater than or equal to 0.
If and only if the ice-cream is vanilla flavour will Xiao Wang eat it.