油(あぶら) aburaは wa水(みず) mizuと to溶(と)け()合(あ)わ()な()い() tokeawanai。 Oil doesn't dissolve in water. Literal Oil [topic-は] water [with-と] not-dissolve-together. 溶け合う (とけあう) combines 溶ける ('to dissolve') with ~合う (reciprocal) — both substances would need to mix mutually. The negative emphasizes the incompatibility. science~合う (reciprocal/mutual action)
油(あぶら) aburaは wa水(みず) mizuと to溶(と)け()合(あ)わ()な()い() tokeawanai。 Oil doesn't dissolve in water. Literal Oil [topic-は] water [with-と] not-dissolve-together. 溶け合う (とけあう) combines 溶ける ('to dissolve') with ~合う (reciprocal) — both substances would need to mix mutually. The negative emphasizes the incompatibility. science~合う (reciprocal/mutual action)