slari -sar- gismu

x₁ is sour/tart to observer x₂.

In notes:

kurki: x₁ is bitter/acrid/sharply disagreeable to observer/sense x₂.
nimre: x₁ is a quantity of citrus [fruit/tree, etc.] of species/strain x₂.
slami: x₁ is a quantity of/contains/is made of acid of composition x₂; (adjective:) x₁ is acidic.
titla: x₁ is sweet/sugary/saccharine to observer x₂.
sarvanju: v₁=s₁ is vinegar made from v₂.
salni: x1 is salty/briny to observer x2.